Check words you know to measure your vocabulary size (number of word families).
study
glass
wheel
table
seek
include
bitter
owe
budget
extent
solution
correspond
enclose
cafe
legislature
sceptic
dissent
spiral
synthetic
vacant
lo
camel
pharmacy
incomprehensible
detract
ghetto
ornate
motel
gymnastics
precondition
cafeteria
idyllic
cossack
occult
catheter
plaid
trepidation
twinge
providence
cognac
aux
carnal
peppermint
macroscopic
pretence
shirk
shrift
tutelage
shenanigan
downy
churlish
phospholipid
fey
gyroscope
neonate
ennui
ostinato
tractable
parotid
biro
tracheotomy
nazionale
betoken
sequoia
cabbalist
pustule
optoelectronic
petard
dullard
bollworm
densitometer
bumptious
buckram
giga
dysplastic
bowdlerise
extralinguistic
bola
sclerotic
pinniped
vivarium
lepidoptery
corkage
fissiparous
tonneau
slub
poltroon
imbrication
phlebotomy
childe
daimon
gravure
bradawl
hest
orthomolecular
gowan
magnificat
balletomane
bathysphere
macrocephaly