| babble(utter, flow, whisper, ripple, mutter) |
| burble(flow, babble, whisper, ripple, mutter) |
| buzz(utter, flow, babble, whisper, ripple) |
| continuous sound(expression, utter, babble, whisper, mutter) |
| drip(utter, flow, babble, whisper, ripple) |
| drone(utter, flow, babble, whisper, ripple) |
| flow(utter, babble, whisper, ripple, mutter) |
| growl(utter, flow, babble, whisper, ripple) |
| gurgle(flow, babble, whisper, ripple, mutter) |
| hum(utter, flow, babble, whisper, ripple) |
| make low(expression, utter, babble, whisper, mutter) |
| meander(utter, flow, babble, whisper, ripple) |
| moan(utter, flow, babble, whisper, ripple) |
| mumble(utter, flow, babble, whisper, ripple) |
| murmur(verb, sound, low, flow, babble) |
| mutter(utter, flow, babble, whisper, ripple) |
| purl(verb, flow, babble, whisper, ripple) |
| purr(utter, flow, babble, whisper, ripple) |
| ripple(flow, babble, whisper, mutter, mumble) |
| rumble(utter, flow, babble, whisper, ripple) |