Check words you know to measure your vocabulary size (number of word families).
head
after
some
walk
intent
fox
decent
drag
deposit
considerable
behave
therapy
alternate
inherent
landlord
aspire
vigil
intermediate
encompass
trot
heed
micro
streamline
enchant
cedar
shabby
rejoice
overrun
unruly
celibacy
beige
fiver
uptake
amicable
dashboard
dermatology
badminton
pelican
gnarled
abstention
synchronous
logarithm
subcutaneous
freaked
stethoscope
kebab
electrocute
damsel
smokestack
desalinate
nightingale
amputee
evanescent
twill
chechen
aortic
baluster
helicobacter
tandoori
clerestory
liege
drat
methionine
vegetal
caryatid
goy
shipshape
trypsin
comprador
knockabout
perdu
hemophilia
impetigo
ultramodern
biorhythm
deadbolt
lumbago
pavan
thermoregulation
tyr
pukka
ashlar
polygenic
coccyx
raff
phenyl
praesidium
hackberry
frowsty
bezique
airedale
helter
netiquette
adamancy
chlorpyrifos
caribe
dipteran
octans
deadeye
cannae