Check words you know to measure your vocabulary size (number of word families).
fear
listen
grandfather
of
refrigerator
interview
gay
grab
curtain
administration
moderate
grasp
opt
temple
gossip
conscience
memoir
solicitor
prose
radioactive
euro
felled
slum
grieve
jab
decipher
platoon
stately
skeletal
lass
ramification
conifer
tern
hypnosis
flog
reissue
rhododendron
condominium
anathema
pothole
adduce
opine
scintillate
saucy
roi
subduct
gendarme
hock
cybernetic
neuropsychology
decrement
stochastic
percussive
dreadnought
silage
guava
streptococcus
ibuprofen
seamy
victuals
cyclamen
tare
laminar
butterfat
martinet
preceptor
shearwater
briny
femtosecond
decathlete
cuttlefish
laburnum
autodidact
malware
paralinguistic
viviparous
mure
straitlaced
gobbledegook
tridentine
blackamoor
synchro
markka
luau
bioaccumulation
llano
curricle
extranet
peroneal
flimflam
trepan
fatuity
braw
jnana
incommodious
golconda
betatron
colly
anableps
operose