Check words you know to measure your vocabulary size (number of word families).
beach
one
watch
gentle
alarm
belong
sheet
empire
destruction
trend
international
inject
widow
bonus
copyright
grief
salute
pasta
liquor
hover
locality
stew
mingle
humane
jade
hamlet
culprit
dysfunction
interlock
sabine
amiss
halloween
intelligentsia
arbiter
petrify
occult
electrolyte
loiter
mauve
delirious
toiletry
laconic
slurp
comme
animus
gangway
neutrophil
acclimatise
occlude
twiddle
angioplasty
osmosis
foundling
feminize
unprepossessing
vert
roadie
comity
cerebellum
forswear
humvee
chloroplast
tare
catarrh
monozygotic
pica
troth
macrocosm
appendectomy
bonobo
cerebella
aikido
doubloon
lederhosen
gosling
cornus
edenic
capitular
shiraz
uniaxial
tantalum
olfaction
velodrome
cryptogam
benison
noddle
moquette
biopolymer
silicic
biowarfare
deaminase
scalene
shally
mamie
cobalamin
bedell
epode
clotheshorse
boscage
metathesis