| mutter(noun, verb, expression, go, sound) |
| whisper(noun, verb, go, information, sound) |
| mumble(noun, verb, go, disorder, sound) |
| buzz(noun, verb, sound, low, hint) |
| grumble(noun, verb, sound, criticize, low) |
| hum(noun, verb, sound, low, hint) |
| moan(noun, verb, sound, criticize, blow) |
| complaint(noun, grumble, lamentation) |
| babble(noun, verb, sound, low, talk) |
| sigh(noun, verb, stir, hint, complain) |
| groan(noun, verb, sound, criticize, protest) |
| undertone(noun, feeling, sound, low, hint) |
| susurration(noun, sound, low, hint, buzz) |
| drone(noun, verb, sound, low, noise) |
| muttering(noun, sound, low, buzz, hubbub) |
| croak(verb, lamentation) |
| whimper(noun, verb, criticize, protest, complain) |
| murmuration(noun, sound, low, buzz, vocalization) |
| plaint(noun, grumble, lamentation) |
| murmuring |