Check words you know to measure your vocabulary size (number of word families).
try
stay
bed
here
measure
reduce
available
wound
resign
publication
destruction
justify
kilogram
candle
intelligent
verbal
precaution
pastoral
bewilder
vent
unison
falter
shovel
diploma
repute
havoc
rivet
detonate
maize
jay
platter
histology
recoup
laurel
lapped
maim
garb
terminus
undercurrent
frugal
pheromone
hologram
guile
quill
forbear
gazebo
declaim
gob
teeny
tenon
multiplex
novella
minuet
concatenate
springbok
foundling
streetcar
contestation
turkic
cupid
bonjour
strudel
grange
bidet
asinine
momento
slapdash
dilly
leu
rosin
lysate
saltire
tuberculin
cenote
dreamtime
surcoat
transoceanic
dojo
denotative
tercentenary
isinglass
mirin
coalfish
icosahedron
lithic
frisket
trichloroacetic
caliche
exedra
alack
histoplasmosis
affaires
equitation
danegeld
stockinette
iritis
mizenmast
jarl
brose
ringhals