Definition of cumulonimbus

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  • cumulonimbus is a valid Scrabble US word with a point value of 20
  • cumulonimbus is a valid Scrabble UK word with a point value of 20
  • cumulonimbus is a valid Words with friends word with a point value of 29

Definition of cumulonimbus

  • a dark cloud of great vertical extent charged with electricity; associated with thunderstorms (noun)

    Synonyms

    1. cumulonimbus cloud
    2. thundercloud

See definition of cumulonimbus in Merriam Webster