| knock(noun, informal, protest, objection, complaint) |
| load(trouble, concern, strain, burden, weight) |
| matter(trouble, worry, difficulty, problem) |
| mischief(noun, cut, hurt, wrong, damage) |
| pain(noun, trouble, bother, worry, scorn) |
| peeve(noun, dislike, bitterness, antipathy, complaint) |
| pest |
| plague |
| qualm |
| reproach(noun, charge, shame, insult, disgrace) |
| roar(noun, protest, objection, complaint, gripe) |
| rumble(noun, charge, protest, objection, complaint) |
| sit-in(noun, civil) |
| torment(trouble, worry, difficulty, lack, injury) |
| unhappiness(noun, trouble, worry, pain, sorrow) |
| weight(noun, trouble, worry, strain, anxiety) |
| whining |
| woe(noun, trouble, worry, pain, sorrow) |
| yell(noun, protest, objection, complaint, gripe) |
| Herculean task(expression, trouble, worry, concern, strain) |