fleas, flees

The words fleas, flees sound the same but have different meanings and spellings. Why do fleas, flees sound the same even though they are completely different words?

The answer is simple: fleas, flees are homophones of the English language.

  1. :: noun

    Plural form of flea.

  1. :: verb-intransitive

    To run away, as from trouble or danger: fled from the house into the night.

  2. :: verb-intransitive

    To pass swiftly away; vanish: "of time fleeing beneath him” ( William Faulkner).

  3. :: verb-transitive

    To run away from: flee the scene of an accident.

Definitions from Wiktionary, Creative Commons Attribution/Share-Alike License, from The American Heritage® Dictionary of the English Language, 4th Edition and Wordnik.

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About Homophones

Homophones (literally "same sound") are usually defined as words that share the same pronunciation, regardless of how they are spelled.

If they are spelled the same then they are also homographs (and homonyms); if they are spelled differently then they are also heterographs (literally "different writing").