Vocabulary collection
Commonly Confused English Words
Pairs and near-synonyms that English learners often mix up, with quick links to meanings and examples.
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Words
affect
usually a verb meaning to influence
effect
usually a noun meaning result
complement
to complete or go well with something
compliment
praise or a polite expression
principal
main or most important
principle
a basic rule or belief
ensure
to make certain
insure
to protect with insurance
stationary
not moving
stationery
paper and office materials