Check words you know to measure your vocabulary size (number of word families).
worse
beyond
music
afford
instance
competition
invite
dish
adjust
resolve
remedy
presence
ferry
fluid
fog
fragile
mob
butcher
moan
chatter
deceive
poultry
woo
crow
endear
combustion
mariner
gravely
collude
multiplicity
writhe
amiss
wand
turbo
armpit
embalm
rewind
suckle
crotch
gauze
radiograph
diuretic
sari
spectrometer
motorcade
underprivileged
diurnal
felicity
rad
smokestack
sloop
finicky
asi
declassify
flexion
igneous
indissoluble
dross
antrum
biannual
cenotaph
strudel
bitmap
airplay
elastin
camomile
gusset
seraph
sociometric
spreadeagle
blockhouse
gibbous
confocal
saturnine
withal
icky
crypto
kabob
sluggard
sederunt
endo
levator
jabot
mastoidectomy
bariatric
pima
ratbag
babu
borane
dipsomaniac
saccule
linotype
connate
foix
airt
mamie
hoosegow
saintes
cryosurgery
gallinule