| boom(noun, verb, sound, roar, thunder) |
| fret(verb, oppose, criticize, object, protest) |
| hum(noun, verb, sound, low, pattern) |
| reverberation(noun, roar, rumble) |
| whimper(noun, verb, oppose, criticize, object) |
| yammer(verb, oppose, criticize, object, protest) |
| air a grievance(expression, idiom) |
| bark(noun, verb, protest, flash, complain) |
| beat(noun, verb, rumble) |
| bewail(verb, oppose, criticize, object, protest) |
| clamor |
| crab(verb, criticize, protest, complain, moan) |
| drone(noun, verb, low, complain, buzz) |
| drum(noun, verb, sound, thunder, rumble) |
| fret and fume(expression, idiom) |
| grievance(noun, charge, protest, objection, complaint) |
| growling |
| lodge a complaint(expression, idiom) |
| mope(verb, fret, sulk, languish, pine) |
| object(verb, oppose, criticize, protest, cry) |