Check words you know to measure your vocabulary size (number of word families).
stay
man
realise
stuff
cheese
bug
monkey
plate
civilian
assault
diverse
resign
terminate
dissolve
bold
disclosure
cloak
feast
temper
bail
revert
gypsy
bliss
hamper
broom
precursor
creole
vengeance
whiz
dogma
reset
interlock
derail
ephemeral
resonant
strident
ornithology
abstention
posterity
placenta
crochet
machete
pediatric
curtsy
infill
tungsten
marquess
arthropod
glutamate
kickback
immunohistochemistry
adder
angora
chipmunk
vintner
telephoto
pizzeria
divot
lilliputian
carotene
apostolate
scientism
preamp
colloquy
alfresco
jounce
bittern
espadrille
dentition
aardvark
potshot
transcultural
campari
crucis
ciliate
autochthonous
fletch
cytosol
haematuria
catafalque
tiddly
torr
newtons
shrike
mucopolysaccharide
tintype
betta
cynosure
cerium
inulin
crimplene
gadroon
kefir
bordure
gazania
aubretia
beaverboard
camelopardalis
muggs
fanlight