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Is CO a valid Scrabble word?

No, CO is not a valid word in the US or UK Scrabble lists we use.

What does CO mean?

  1. noun

    an odorless very poisonous gas that is a product of incomplete combustion of carbon

  2. noun

    a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

  3. noun

    one who refuses to serve in the armed forces on grounds of conscience

  4. noun

    a state in west central United States in the Rocky Mountains

Definitions from WordNet 3.1, Princeton University.

Points

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Scrabble

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Words With Friends

2

Letters

Dictionary status

  • Scrabble (US & Canada)Invalid
  • Scrabble (UK & worldwide)Invalid
  • Words With FriendsNot listed

Scrabble lists: NWL2023 (US & Canada) and CSW24 (UK & worldwide). WWF uses our ENABLE reference plus verified additions. “Listed” and “Not listed” describe that reference; check acceptance in the game. Sources reviewed 2026-10-03.

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