| rebellion(noun, difficulty, challenge, objection, demur) |
| recrimination(noun, charge, count, complaint, indictment) |
| reluctance(noun, difficulty, challenge, objection, demur) |
| reservation(noun, difficulty, challenge, objection, demur) |
| scruple(noun, difficulty, challenge, objection, demur) |
| skepticism(noun, difficulty, challenge, objection, demur) |
| squawk(noun, protest, objection, complaint, quibble) |
| static(noun, difficulty, challenge, objection, demur) |
| suspicion(noun, difficulty, challenge, objection, demur) |
| uncertainty(noun, difficulty, challenge, objection, demur) |
| unease(noun, difficulty, challenge, objection, demur) |
| uneasiness(noun, difficulty, challenge, objection, demur) |
| unwillingness(noun, difficulty, challenge, objection, demur) |
| wail(noun, protest, objection, complaint, quibble) |
| whimper(noun, protest, objection, complaint, quibble) |
| whine(noun, protest, objection, complaint, quibble) |
| whinge(noun, protest, objection, complaint, quibble) |
| yammer(noun, protest, objection, complaint, quibble) |