Check words you know to measure your vocabulary size (number of word families).
nation
finish
pardon
many
grant
league
committee
ease
violate
opera
urban
utility
clone
nutrition
linger
cord
diplomacy
teen
multimedia
scarf
retort
invert
intolerable
bog
ingenious
tuft
convulse
leukaemia
biomass
revolver
safari
pantry
sizeable
tulip
custodian
martini
radiotherapy
stencil
disembark
heckle
pedant
cadre
cirrhosis
preset
colander
overstep
kipper
cheddar
bicuspid
plucky
mig
piggyback
fulminate
archangel
amine
bung
honeydew
sward
oomph
penile
fishtail
twat
qwerty
pilsner
bight
epicopal
whitefish
immunocompromised
milady
nooky
ludic
plantar
memoire
pooper
minuted
aether
leat
jitney
hadrosaur
dopant
bateau
oubliette
tumbril
embayment
encephalomyelitis
goanna
pantechnicon
demarche
gaboon
umlaut
linotype
arborvitae
cobber
pharmacognosy
oxalis
thurible
carburize
boscage
ancillae
versant