a versus an
angle
bigamy versus polygamy
binal versus binary
cent versus cents
century versus hundreds
collective nouns
count nouns
couple
currency
date
decade versus tens
decimate
degrees, minutes, and seconds
dollars and cents
duplicate versus replicate
euro and cent
few/fewer/fewest versus little/less/least
First World
Fourth World
hexadecimal versus sexdecimal
hours, minutes, and seconds
hundreds versus century
little/less/least versus few/fewer/fewest
many/more/most versus much/more/most
mass nouns
millennium versus thousands
money
much/more/most versus many/more/most
percent
pesos and centavos
the suffix -plex
polygamy versus bigamy
pounds and decimal pence
Second World
sexdecimal versus hexadecimal
tens versus decade
Third World
thousands versus millennium
time
unique
year, month, and day
zero
Dictionary of Number Words
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