gentle vibration
- humLow steady sound
- buzzContinuous low drone
- purrFeline contentment sound
- tremorInvoluntary rhythmic shaking
- pulseArterial blood throb
quiver · flutter · thrum · murmur · massage · shiver · tingle · rumble · soothe · phone · motor · cat · heartbeat · ripple · whisper · tremble · oscillate · hush