| Rating | Solver | Clue |
|---|---|---|
| MOO | Low noise | |
| HUM | Low noise | |
| RUMBLE | Low noise | |
| BOOM | Low resounding noise | |
| GRUNTS | Emits a low short gruff noise | |
| MUTTER | To sound with a low, rumbling noise. | |
| WHISPER | To make a low, sibilant sound or noise. | |
| MURMUR | To make a low continued noise, like the hum of bees, a stream of water, distant waves, or the wind in a forest. | |
| CROAK | To make a low, hoarse noise in the throat, as a frog, a raven, or a crow; hence, to make any hoarse, dismal sound. | |
| BUZZ | A continuous, humming noise, as of bees; a confused murmur, as of general conversation in low tones, or of a general expression of surprise or approbation. | |