words ending in vowel - o
words ending in f
words ending in ff
words ending in consonant - o
plurals with just s
200
stereos
television, radios
200
ourselvesmyself, yourself
ourselves
200
thieves
robbers, burglars
200
dominoes
checkes, chess
200
quizzes
test , exams
300
echoes
sound coming back
300
leaders
chiefs
300
pants
hats, shirts
400
volcanoes
earthquake, eruption
400
it can hold books
shelves
400
staffs
bosses need this group of people to get the work done
400
piano
minor and major keys
400
solo
only one person at a time
500
studios
musicians, painters
500
underwater ridges
reefs
500
sheriffs
police, mashalls
500
measles
chicken pox, mumps.
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