Check words you know to measure your vocabulary size (number of word families).
boat
run
hair
penny
message
alcohol
union
attitude
alongside
accelerate
entry
profile
sentiment
gleam
loop
classification
sway
cosy
cradle
captive
stipulate
stifle
knuckle
squadron
egalitarian
headlight
playwright
proxy
conifer
overture
reset
bon
proffer
quay
phobia
partake
cask
doe
expedite
preconception
paragon
opiate
bronchitis
libretto
cursive
obelisk
phylum
gaffe
blurb
troubadour
hypnotherapy
hydrochloric
psychotropic
poky
newsagent
sophomore
decathlon
rood
fora
rapier
scherzo
tek
illiquid
ayurvedic
claptrap
baulk
polymath
goosebump
jackboot
gelatine
cloverleaf
neuroblastoma
mescaline
downmarket
hebe
intranet
oestrus
mure
lectin
exemplum
thrombi
maunder
vinifera
brevet
fungoid
automat
emmental
catamount
nisei
campagna
muggins
panoptic
liripipe
flump
danegeld
tweeny
cyberspace
endodontic
brail
guaiacum