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Synonyms for grumble

verb

  1. To complain

    whine, protest, fuss; see complain 1.

  2. To growl

    snarl, gnarl, gnarr*, snap, bark, grunt, mutter, rumble, croak, roar, splutter, snuffle, whine.

  3. To mutter

    murmur, mumble, whine; see mutter 2.

See grumble in Webster's New World Roget's A-Z Thesaurus II

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