Check words you know to measure your vocabulary size (number of word families).
oil
low
short
plant
onion
progress
punish
shelter
recession
portrait
catholic
loyal
indigenous
vivid
dull
wit
analytic
arbitrate
socialise
reminisce
locomotive
buoy
heath
crate
creed
skid
heady
slime
censure
synagogue
elective
aft
nook
convection
crucify
orthopaedic
latex
ascetic
paucity
proletarian
supersonic
pathogenesis
shrew
asynchronous
scoundrel
trilobite
pontoon
sprightly
sepsis
miscreant
novella
underweight
plunk
simplex
lowdown
nectarine
shellac
hobo
lolly
langue
methionine
tsetse
nutcase
comfrey
cumulate
superstate
downhearted
afrocentric
daiquiri
potsherd
chancellery
torre
rejig
aporia
dux
mandrel
burqa
barberry
antineutrino
ischia
candlewick
thaler
scow
asterism
casbah
medius
tabu
rath
stertorous
boodle
forsooth
embolus
dormy
azoic
hydria
cabbala
monosaccharide
geegaw
alkene
corium