Level 20: Level 20
Level 20
1000 base
820 derived
Base words
abaya
- abayas
abeam
ablate
- ablated
abracadabra
acetyl
acidophilus
acromegaly
- acromegalia
- acromegalic
acte
- actes
actinic
acupressure
acyl
adamantine
adrenergic
- adrenergically
advertorial
- advertorials
aerogramme
- aerogram
- aerogrammes
- aerograms
aflatoxin
- aflatoxins
aitch
- aitches
alendronate
aleph
alewife
- alewives
allegretto
- allegrettos
allele
- alleles
- allelic
almoner
- almoners
- almonry
alpina
ambulant
ammonoid
- ammonoids
amphibole
- amphiboles
- amphibolite
- amphibolites
amphotericin
ampulla
- ampullae
anadromous
analysand
- analysands
anas
ancova
- ancovas
anencephalic
- anencephaly
ani
anthocyanin
- anthocyanins
anthropomorphize
- anthropomorphized
- anthropomorphizing
anticline
- anticlines
antimacassar
- antimacassars
antineutrino
- antineutrinos
apiary
- apiaries
- apiarist
- apiarists
aplastic
appian
aquarist
- aquarists
arabica
archaism
- archaisms
archimandrite
- archimandrites
arcminute
- arcminutes
armamentarium
arquebus
- arquebuses
- arquebusier
- arquebusiers
- harquebus
- harquebuses
- harquebusier
- harquebusiers
arteriography
aslant
aspidistra
- aspidistras
astrocytes
astrometric
- astrometry
ataxia
- ataxic
atheroma
- atheromas
- atheromata
atrazine
atresia
- atresias
attar
- atar
- athar
audiophile
- audiophiles
auscultate
- auscultated
- auscultates
- auscultating
- auscultation
australopithecine
- australopithecines
autogenic
- autogenics
autogyro
- autogiro
- autogiros
- autogyros
axil
- axils
axion
- axions
azathioprine
azide
badinage
bafta
- baftas
bahian
balderdash
ballsy
barberry
- barberries
barefaced
- barefacedly
beanie
- beanies
beefeater
- beefeaters
beignet
- beignets
beribboned
bestir
- bestired
- bestirring
- bestirs
billabong
- billabongs
binnacle
- binnacles
bint
- bints
bioaerosol
- bioaerosols
bioassay
- bioassays
biobased
biohazard
- biohazards
biomedicine
biomorphic
bioprospecting
bioreactor
- bioreactors
biotype
- biotypes
bioweapon
- bioweapons
birefringence
- birefringent
blackleg
- blacklegs
blat
- blatter
- blatting
blaxploitation
blini
- blinis
bobwhite
- bobwhites
boche
- boches
boing
- boings
bola
- bolas
- bolases
bonheur
booger
- boogers
boondocks
borate
boric
bosh
bowerbird
- bowerbirds
bradycardia
braze
- brazed
- brazes
- brazing
breathalyzer
- breathalyzers
breccia
breviary
- breviaries
bruschetta
- bruschettas
budgerigar
- budgerigars
bullfinch
- bullfinches
bullhead
- bullheads
buprenorphine
burqa
- burqas
butadiene
byelection
- byelections
caballero
cahier
- cahiers
caiman
- caimans
caldron
- caldrons
canasta
cannoli
- cannolis
cannulation
cantus
capitular
- capitularies
- capitulary
capsicum
- capsicums
carbonara
carbonyl
- carbonyls
carborundum
cardy
- cardies
carpaccio
catafalque
- catafalques
catechin
- catechins
catechumen
- catechumens
cathexis
- cathexes
cathodic
caudillo
- caudillos
caul
cavitation
cella
centime
- centimes
cento
centrale
centroid
cephalosporin
- cephalosporins
cerebrum
- cerebra
- cerebrums
ceviche
chaffing
challah
chapeau
charabanc
- charabancs
charwoman
- charwomen
chiastic
chicane
- chicanes
chicha
chiton
- chitons
chlordane
chocoholic
- chocoholics
chondrule
- chondrules
chorea
chromosphere
chthonic
- chthonian
chukar
- chukars
chukka
- chukkas
cinchona
clangour
- clangor
- clangorous
- clangourous
clavier
- clavierist
clonk
- clonked
- clonking
- clonks
coagulopathy
cockade
- cockaded
- cockades
codfish
cogito
coir
colophon
- colophons
comital
commensurable
- commensurability
compo
- compos
concerti
coneflower
- coneflowers
confab
- confabs
confute
- confutation
- confutations
- confuted
- confuter
- confutes
- confuting
congener
- congeners
conger
- congers
conodont
- conodonts
consomme
copyhold
- copyholds
cordage
coruscate
- coruscated
- coruscates
- coruscating
- coruscation
- coruscations
coryza
costal
cotoneaster
- cotoneasters
cottontail
- cottontails
coulee
- coulees
counterfoil
- counterfoils
counterpoise
cours
cowlick
- cowlicks
cowpoke
- cowpokes
coypu
- coypus
crackhead
- crackheads
craton
- cratonic
- cratons
credenza
cribbage
croton
- crotons
crucifer
- cruciferous
cruet
- cruets
crypto
cryptogram
- cryptograms
cuirass
cupidity
curandero
- curanderos
cyanosis
cytosol
- cytosolic
dactyl
- dactylic
- dactyls
dago
- dagoes
- dagos
daikon
damselfly
- damselflies
dandle
- dandled
- dandles
- dandling
deadlift
- deadlifts
debouch
- debouched
- debouches
- debouching
- debouchment
- debouchments
decalogue
decidendi
declension
- declensions
demotivate
- demotivated
- demotivates
- demotivating
demyelinate
- demyelinated
- demyelinates
- demyelinating
- demyelination
denotative
depilatory
- depilatories
deponent
- deponents
derridean
descant
descry
- descried
- descries
- descrying
dhoti
- dhotis
diamante
diathermy
- diathermic
diatomic
diegetic
dihedral
dillydally
- dillydallying
diluent
dinero
dingbat
- dingbats
diorite
disarrange
- disarranged
- disarrangement
- disarranges
- disarranging
disport
- disported
- disporting
- disports
doa
dodgem
- dodgems
dojo
- dojos
domo
- domos
doodad
- doodads
doozy
dopaminergic
- dopaminergically
dopant
- dopants
dorsiflexion
dragster
- dragsters
dreck
drogue
dromedary
- dromedaries
dropsy
drumlin
- drumlins
duiker
- duikers
durum
dweeb
- dweebs
dynamometer
- dynamometers
dysphoria
- dysphoric
ecclesia
- ecclesias
echocardiogram
- echocardiograms
eclogue
- eclogues
ecosphere
ecru
ectoderm
- ectodermic
edelweiss
edenic
educe
- educed
- educes
- educible
- educing
- eduction
edutainment
eelgrass
effulgent
- effulgence
- effulgently
eland
- elands
elastase
electrocautery
elver
- elvers
embouchure
- embouchures
embryonal
empanada
- empanadas
empiric
emptor
endoderm
enterotoxin
- enterotoxins
ephedra
episiotomy
- episiotomies
epitaxy
- epitaxial
- epitaxially
epoxide
- epoxides
ergometer
- ergometers
erythropoietin
escarole
escheat
- escheated
- escheating
- escheator
- escheators
- escheats
estoppal
- estopped
estradiol
ethnomethodology
- ethnomethodologist
etoile
- étoile
euphony
- euphonic
- euphonically
- euphonies
eutectic
eventide
exciton
- excitons
execrate
- execrated
- execration
- execrations
exempla
exemplum
extralinguistic
factitious
- factitiously
- factitiousness
fado
- fados
fascicle
- fascicled
- fascicles
feck
- fecking
federative
fellahin
- fellaheen
fetlock
- fetlocks
firma
fleshpot
- fleshpots
fletch
- fletched
flexi
flic
- flics
fluorosis
folle
- folles
foraminifers
- foraminifera
foreland
- forelands
fortis
freeboard
fricassee
- fricasseed
- fricasseeing
frittata
- frittatas
frizzle
- frizzled
- frizzles
- frizzling
fron
- frons
fug
- fuggier
- fuggiest
- fuggy
fumigant
- fumigants
fusilli
galette
- galettes
galleria
gametophyte
- gametophytes
gamine
ganja
gantlet
gasohol
gat
gavotte
- gavottes
gazillion
- gazillions
geocentric
- geocentrically
- geocentrism
geometer
- geometers
geosynchronous
gerbera
- gerberas
gerontocracy
- gerontocracies
- gerontocrat
- gerontocratic
- gerontocrats
gewgaw
- gewgaws
ghat
- ghats
ghostwriter
- ghostwriters
gillie
- gillies
gimcrack
- gimcrackery
ginormous
glebe
- glebes
glioblastoma
- glioblastomas
glioma
- gliomas
globin
glockenspiel
- glockenspiels
glop
- gloppy
- glops
glucosamine
glutaraldehyde
gluteal
- gluteals
glycemic
glyphosate
gobbledegook
godwit
- godwits
goliath
- goliaths
gonadotropin
- gonadotropins
goniometer
- goniometers
goober
- goobers
goofball
- goofballs
gooseflesh
- goosefleshed
gorget
- gorgets
gorgonzola
gorp
- gorping
grackle
- grackles
grappa
greensward
groundfish
gudgeon
- gudgeons
gul
gumboot
- gumboots
gustatory
gyroplane
- gyroplanes
habitue
- habitues
hadrosaur
- hadrosaurs
haematoma
- haematomas
haematuria
- hematuria
halite
- halites
haole
- haoles
hardtack
harebell
- harebells
hebraic
hemangioma
- hemangiomas
hematoma
- hematomas
henpeck
- henpecked
- henpecking
- henpecks
heptathlon
- heptathlons
heteronomous
- heteronomously
hexafluoride
hexameter
- hexameters
hexane
hissy
histiocytes
- histiocytosis
hod
- hodders
- hods
hogget
- hoggets
homburg
- homburgs
homebase
hominy
hoofer
- hoofers
hoopoe
- hoopoes
hornpipe
- hornpipes
horology
- horological
- horologist
hotchpotch
hottie
- hotties
humdinger
- humdingers
humeral
hydride
- hydrides
hydroquinone
hymnody
hyperbola
- hyperbolae
- hyperbolas
hypericum
hyperlink
- hyperlinked
- hyperlinking
- hyperlinks
hyperparathyroidism
hypocaust
hypochondriacal
hypothermic
ichor
- ichorous
ick
- icks
identikit
- identikits
iliac
illite
- illites
immunoblot
- immunoblotting
impedimenta
impost
- imposts
incus
indicia
indium
indurate
- indurated
- indurates
- indurating
- induration
ingle
- ingles
inglenook
- inglenooks
integument
- integuments
intercooler
- intercoolers
interdigitate
- interdigitated
- interdigitates
- interdigitating
- interdigitation
internat
intifadah
- intifadeh
intimal
invigilate
- invigilated
- invigilates
- invigilating
- invigilator
- invigilators
ipecac
- ipecacuanha
ischia
- ischial
jai
jambalaya
jamesian
javelina
- javelinas
jaywalk
- jaywalker
- jaywalkers
- jaywalking
jefe
- jefes
jello
jetlag
- jetlagged
jezebel
- jezebels
jitney
- jitneys
joggle
- joggled
- joggles
- joggling
jonquil
- jonquils
juju
juste
justiciar
- justiciars
kabob
- kabobs
kakapo
- kakapos
kami
kazoo
- kazoos
kerf
- kerfed
- kerfing
- kerfs
kibitz
- kibitzed
- kibitzer
- kibitzers
- kibitzing
kibosh
kickstart
- kickstarted
- kickstarting
- kickstarts
killifish
kimberlite
knap
- knapped
- knapping
- knaps
knurl
- knurled
- knurling
- knurlish
- knurls
- knurly
kola
kolkhoz
kos
kraal
- kraals
kris
- krises
kroon
- kroons
kundalini
laager
- laagers
labrum
lachrymose
- lachrymosely
- lachrymosity
lacrimal
lacustrine
lambent
- lambencies
- lambency
lamellar
landau
- landaus
langoustine
- langoustines
langur
- langurs
lariat
- lariats
latifundium
- latifundia
laybys
- layby
leat
- leats
lectin
- lectins
legerdemain
leishmania
- leishmaniases
- leishmaniasis
lenten
leptin
lewisian
libber
- libbers
libero
libran
- libra
librate
- librated
- librates
- librating
- libration
- librations
licencee
- licencees
licentiate
lindane
litem
lollop
- lolloped
- lolloping
- lollops
loral
lory
- lories
lour
- loured
- louring
- lours
lovage
lubber
- lubbers
lumbago
lunette
- lunettes
lunt
lutea
lymphoblastic
machina
macroeconomist
- macroeconomists
magmatic
magnetar
- magnetars
magneto
mahonia
mailshot
- mailshots
maladroit
- maladroitly
- maladroitness
malaprop
- malapropism
- malapropisms
mameluke
- mamelukes
manilla
mannitol
mantilla
- mantillas
marche
marchese
mariculture
marmite
marram
- marrams
massa
mazy
mealybug
- mealybugs
medica
medicament
- medicaments
medigap
medlar
- medlars
megafauna
melanism
- melanic
- melanisms
memoriam
meningioma
- meningiomas
mensch
mentee
- mentees
merengue
- merengued
- merengues
- merenguing
merman
- mermen
mesclun
mesoderm
messieur
- messieurs
metalanguage
- metalanguages
metallica
metamorposis
- metamorphism
metastable
methylmercury
metrology
mezzotint
- mezzotints
micelle
- micellar
- micelles
microbrew
- microbrewery
- microbrews
microcephaly
- microcephalic
- microcephalous
- microcephalus
microfiber
- microfibers
microtitre
microworld
- microworlds
mics
micturate
- micturated
- micturates
- micturating
- micturition
midrash
millibar
- millibars
millivolt
- millivolts
mim
minny
- minnies
minyan
moil
- moiled
- moiler
- moilers
- moiling
- moils
molal
- molality
- molarity
moly
momenta
mongoloid
- mongoloids
monophyletic
monstrance
- monstrances
mountebank
- mountebanks
mucoid
multicomponent
multigenerational
multitalented
multivalent
muntjac
- muntjacs
mure
- mured
- mures
- muring
murrelet
- murrelets
muscadine
- muscadines
muscatel
- muscatels
musette
- musettes
mustelid
- mustelids
myasthenia
- myasthenic
myocyte
- myocytes
myoelectric
naltrexone
nanomachine
- nanomachines
nanostructure
- nanostructured
- nanostructures
narco
- narcos
nauseam
neem
neodymium
nephritis
- nephritic
nephrology
- nephrologist
- nephrologists
nephrotoxic
nereid
- nereids
neroli
neuro
neurodegenerative
newshound
- newshounds
nicad
nifedipine
nighthawk
- nighthawks
nightjar
- nightjars
nincompoop
- nincompoops
noisette
- noisettes
nori
norte
noumenon
- noumena
- noumenal
novus
nucleosynthesis
nugatory
numbskull
- numbskulls
- numskull
- numskulls
nutria
- nutrias
nymphet
- nymphets
oast
- oasts
obi
objet
obligato
- obbligato
obsequy
- obsequies
oestrus
offertory
ogee
- ogees
oink
- oinked
- oinking
- oinks
oleate
oligomer
- oligomers
oligosaccharide
- oligosaccharides
openwork
- openworked
ophiolite
- ophiolites
optima
orangery
ordo
ordure
ort
- orts
osmium
ostpolitik
otic
otologic
otosclerosis
outturn
pachyderm
- pachyderms
palanquin
- palanquins
paleoanthropology
- paleoanthropologist
- paleoanthropologists
paleography
- palaeographer
- palaeography
- paleographer
palp
- palps
paraclete
paraeducator
- paraeducators
parafoil
- parafoils
paramagnetic
parcs
parlement
parturition
pastern
- pasterns
patronym
- patronymic
- patronymics
pavan
- pavane
- pavanes
- pavans
peahen
- peahens
pearlescent
- pearlescence
peduncle
- peduncles
- peduncular
pelota
perchlorate
peri
perlite
pertinacious
- pertinaciousness
- pertinacity
pharyngitis
philadelphus
phospholipase
- phospholipases
photodiode
- photodiodes
photolithography
- photolithograph
- photolithographic
- photolithographically
phytoestrogen
- phytoestrogens
phytolith
- phytoliths
pickerel
- pickerels
pilar
pillock
- pillocks
pinniped
- pinnipeds
pinon
- pinons
pistil
- pistils
pitbull
- pitbulls
pizzicato
planetoid
- planetoids
plash
- plashed
- plashes
- plashing
platen
- platens
playa
plebe
- plebes
plectrum
- plectrums
pleomorphic
- pleomorphism
ploidy
pneumothorax
poleax
- poleaxe
- poleaxed
- poleaxes
- poleaxing
polyphenol
- polyphenols
polypoid
polyvalent
- polyvalence
pomander
- pomanders
poofter
- poofters
popinjay
- popinjays
portakabin
- portakabins
prate
- prateed
- prates
- prating
- pratingly
preterite
- preterit
- preterites
primavera
proforma
progestin
- progestins
projet
- projets
pronate
- pronated
- pronates
- pronating
- pronation
prosopopoeia
- prostatectomies
proteinuria
prothrombin
proto
protostar
- protostars
provender
provolone
prozac
psychoeducational
pterosaur
- pterosaurs
pudendum
- pudenda
- pudendal
puerperal
- puerperally
purlieu
- purlieus
purlin
- purlins
pyrolysis
- pyrolytic
- pyrolytically
pyromaniac
- pyromania
- pyromaniacal
- pyromaniacs
pyruvate
- pyruvic
pyx
- pyxes
quadrat
- quadrats
quadrature
quadrille
- quadrilles
quadruplet
- quadruplets
quai
quoin
- coign
- coigne
- coignes
- coigns
- quoins
quoth
ragweed
ragwort
raisonne
ranched
ranchero
- rancheros
rasa
rata
recto
- rectos
recusant
- recusants
rege
- reges
regius
renminbi
- renminbis
repro
reprographics
- reprographer
- reprographic
- reprography
resveratrol
reticle
- reticles
retsina
rhabdomyosarcoma
- rhabdomyosarcomas
rhinoplasty
rhodopsin
- rhodopsins
rhombus
riband
- ribands
ribozyme
- ribozymes
riffraff
rigatoni
rima
- rimas
ripcord
- ripcords
roister
- roistered
- roistering
- roisters
rolodex
roustabout
- roustabouts
rube
- rubes
rubidium
ruction
- ructions
rutabaga
- rutabagas
sabot
- sabots
sacerdotal
- sacerdotally
sagittarian
- sagittarius
sainte
salicylate
saltine
- saltines
saltpetre
salvific
sambar
- sambars
sampan
- sampans
sandgrouse
sanitarium
- sanitariums
saponin
- saponins
saraband
sargasso
- sargassum
sati
- satis
satinwood
saurian
- saurians
savoir
sawfly
- sawflies
sawgrass
saxifrage
scatty
- scattier
- scattiest
- scattiness
scaup
- scaups
schnauzer
- schnauzers
sclerotic
scoter
- scoters
scramjet
- scramjets
scrumpy
scut
- scuts
scutter
- scuttered
- scuttering
- scutters
scuttlebutt
scuzzy
- scuzzier
- scuzziest
- scuzzily
sealift
- sealifted
- sealifting
- sealifts
sebum
sederunt
sedulous
- sedulously
selvedge
- selvedges
sensate
serotype
- serotyped
- serotypes
- serotyping
shako
- shakos
shamus
shantung
shiraz
shuffleboard
siliceous
silvicultural
similitude
- similitudes
simpatico
singletons
sinusoid
- sinusoids
sirree
- siree
siskin
- siskins
sisyphean
skald
- skalds
skank
- skanked
skiffle
slattern
- slatterns
slowpoke
- slowcoach
- slowcoaches
- slowpokes
sluggard
- sluggardly
- sluggards
snaffle
- snaffles
socialiste
sociobiological
soleil
somite
- somites
sonograph
- sonographic
- sonographs
- sonography
speleology
- speleological
- speleologist
- speleologists
sphenoid
splodge
- splodged
- splodges
- splodging
spokeshave
- spokeshaves
starveling
- starvelings
stearic
stegosaurus
- stegosauri
stela
stereophonic
- stereophonically
steric
stogie
- stogies
- stogy
stook
- stooked
- stooking
- stooks
stope
- stopes
straitlaced
strewth
stroboscopic
stromatolite
- stromatolites
subaerial
- subaerially
subrogate
- subrogated
- subrogates
- subrogating
- subrogation
sunbird
- sunbirds
superfluity
supernormal
supersize
supraventricular
sutra
- sutras
swansong
- swansongs
swazi
swidden
- swiddens
swiftlet
- swiftlets
swingman
- swingmen
swizzle
syllabary
syn
synchronism
- synchronistic
syndic
- syndicators
tactual
tahini
tallboy
- talboys
tampax
tante
taproot
- taproots
taramasalata
tarsal
- tarsals
tatler
- tatlers
technetium
teetotaller
- teetotallers
telematics
teleprinter
- teleprinters
tempura
tercentenary
- tercentenaries
terpene
- terpenes
terrane
- terranes
tesla
tete
tetrapod
- tetrapods
thane
theocrat
- theocrats
theodicy
theodolite
- theodolites
therm
- thermic
- therms
thermistor
- thermistors
thermo
thermography
- thermographic
thermoregulation
thimerosal
thrombocytopenia
thyroidectomy
thyroiditis
tighthead
tike
- tikes
tisane
- tisanes
tocotrienol
- tocotrienols
toothsome
tostada
- tostadas
toxaemia
- toxemia
toxoid
tractarian
- tractarianism
- tractarians
traduce
- traduced
- traducer
- traducers
- traduces
- traducing
tragicomic
transcutaneous
transdisciplinary
transhistorical
transoceanic
transworld
trey
- treys
trichloroethylene
tricorn
- tricorne
tridentine
trifid
- trifids
trilingual
triplane
- triplanes
triplex
triploid
- triploids
trireme
- triremes
triton
- tritons
trivet
- trivets
trochanter
- trochanters
trophoblast
tropism
- tropisms
- tropistic
truckle
- truckled
- truckler
- trucklers
- truckles
- truckling
tryptic
tubifex
turkmen
turpitude
turps
twigged
- twigging
twixt
tyr
ujamaa
ulnar
umma
- ummah
underlease
uniaxial
uniformitarian
- uniformitarians
vancomycin
variegata
veep
verdigris
veritas
verst
- versts
viceroyalty
vicomte
- vicomtes
villein
- villeins
vincristine
- vincristines
vires
vivace
voracity
vulcanology
- vulcanologist
- vulcanologists
wale
- waled
- waling
wast
wat
- wats
watsonian
- watsonians
weepie
- weepies
wetback
- wetbacks
whacky
- whackiness
whodunnit
- whodunnits
whump
- whumped
- whumping
- whumps
wildcatter
- wildcatted
- wildcatters
- wildcatting
windjammer
- windjammers
wintergreen
witter
- wittered
- wittering
- witters
woad
wolfram
wuss
- wusses
- wussy
yid
- yids
zebu
- zebus
zonk
- zonked
zooid
- zooidal
- zooids
zoonotic