Check words you know to measure your vocabulary size (number of word families).
land
need
main
pick
mass
juice
pitch
plain
legislate
persist
grave
embrace
stab
venue
tuck
cautious
rectangle
prone
fasten
ratify
compulsory
caption
squeak
suffice
glean
stealth
menstruate
genocide
satan
combo
cello
heather
credence
helix
grub
recluse
pelican
visor
renege
thoroughfare
polygon
misnomer
bedevil
proselytize
papyrus
gasket
incomer
neutrophil
jabber
humbug
ravioli
disinformation
exoskeleton
marque
shortbread
irredeemable
addle
comeuppance
spect
procurator
doppelganger
diatonic
ketamine
salver
bipedalism
kudu
bifida
bunion
chaffinch
barque
humic
quietism
kif
latina
prototypic
naphthalene
taproot
methylmercury
boric
commensurable
chia
qatari
corries
dialyse
poltroon
mutatis
luvvie
minicar
danseuse
homie
pupfish
emmer
heiau
destine
geest
alkyne
curvet
epiphenomenalism
chiromancer
spital