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Glossary of Usage: Index of Commonly Confused Words

By Richard Nordquist, About.com

"Advice" or "advise"? "Farther" or "further"? "Principal" or "principle"? It's easy to confuse words that are similar in sound, spelling, or meaning. But with a bit of review it's also easy to clear up such confusions.

Here in our Glossary of Usage you will find more than 150 sets of commonly confused words--with links to definitions, examples, and practice exercises that should help you keep these words straight. You can test your understanding of these words at our Review Quiz: Commonly Confused Words and Quiz on 20 Commonly Confused Words.

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Review:
Test your understanding of these words at our Review Quiz: Commonly Confused Words and Quiz on 20 Commonly Confused Words.

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