List of mutter synonyms and mutter related words.
air a grievance, aspirate, aspiration, bark, bated breath, bawl, beef, bellow, bellyache, bitch, blare, blat, blubber, boom, bray, breath, breathe, breathy voice, buzz, cackle, chant, chirp, clamor, complain, coo, crab, croak, crow, cry, dolorous tirade, drawl, drone, droning, exclaim, exhalation, flute, fret, fret and fume, fumble, fuss, gabble, gasp, gibber, gibbering, gripe, groan, grouch, grouse, growl, grumble, grunt, hiss, holler, howl, jabber, jeremiad, jibber, keen, kick, lament, lilt, little voice, lodge a complaint, low voice, maffle, maunder, maundering, moan, mouth, mouthing, muddle, mumble, mumbling, murmur, murmuration, murmuring, mussitate, muttering, outcry, pant, pipe, plaint, planctus, raise a howl, register a complaint, repine, roar, rumble, rumor, scold, scream, screech, shriek, sibilate, sigh, sing, snap, snarl, snort, sob, soft voice, sough, speak incoherently, splutter, sputter, squall, squawk, squeal, stage whisper, still small voice, susurrate, susurration, susurrus, swallow, take on, thunder, tirade, trumpet, twang, ululation, underbreath, undertone, wail, wail of woe, warble, whimper, whine, whisper, whispering, whistle, yap, yawp, yell, yelp, yowl