Check words you know to measure your vocabulary size (number of word families).
winter
thank
heart
degree
fail
seed
announce
tongue
assign
corrupt
discreet
input
broker
verify
rap
brass
flutter
transcend
telegraph
robe
regenerate
wield
pharmacy
compass
auditorium
gully
intravenous
deft
interlock
envisage
bikini
gruesome
envision
quartz
hapless
weaponry
gamut
jangle
slurry
nappy
quandary
inquisitor
pontificate
causeway
woof
beneficent
disgorge
iconoclast
wuthering
macros
scalar
adenocarcinoma
miscellany
aquamarine
springbok
foundling
hydroponic
fissile
nanotube
upbraid
sommelier
titres
kooky
surtax
giardia
chinchilla
cerebrovascular
shiftless
rosin
geoscience
museology
megachurch
criollo
rumbustious
adobo
jicama
blini
momenta
enterotoxin
amphotericin
gammy
placeman
formic
dizygotic
soke
fellate
rancheria
enure
dacoit
viaticum
sneck
cantabile
pinfold
bistort
infante
reserpine
barouche
spean
muliebrity
kiribati