Check words you know to measure your vocabulary size (number of word families).
toward
back
class
amount
sink
version
bay
gain
sympathy
clinic
sacrifice
ritual
tribunal
knot
overlap
artificial
tomb
curator
meditate
heterosexual
twilight
contented
infantry
secrete
pious
thereof
fetal
infamous
replenish
zest
grandiose
lug
gratuitous
slouch
splatter
phobia
bronco
mascot
montage
atrophy
crochet
libretto
trestle
nihilism
tannin
indigent
antibacterial
biomechanical
abbess
pituitary
spectroscope
overgrazed
bung
daemon
fanzine
apoptosis
homolog
squaw
bongo
glucagon
coliform
protrusion
gigolo
electroplate
blackthorn
troth
carcinogenesis
grotty
calisthenic
plainsong
mesothelioma
micronutrient
tatami
microflora
peaky
sulfite
cathexis
sirree
chaffing
trifid
chainmail
weskit
affiance
minimax
abomasum
marabout
prussic
mish
panoptic
gibbete
switcheroo
inulin
silicium
pdq
lakh
gaur
hypergastrinaemia
moet
chinch
inductance