Synonyms of mutter

1 Syllable

growl, speak, snarl, grunt, croak, grouch, sough, moan, tal, kvetch, groan

2 Syllables

sputter, muddle, mumbled, soughed, gibber, complain, purred, whispers, gibbers, jabber, snarled, swallow, spake, rumble, snarling, mumble, mumbling, griping, soughing, murmurs, purring, spoke, grouse, chinning, chinned, jabbers, voice, murmur, whisper

3 Syllables

gibbering, vocalism, jabbered, uttering, jabbering, murmuring, susurrus, murmured

4 Syllables

murmuration, trivialized, trivialize, divulgence, susurration, yakkety-yak, undertone, trivializing, susurrate