| complainant |
| contumacious |
| crabby(adjective, upset, unhappy, angry, annoyed) |
| cranky(adjective, annoyed, grumpy, discontented, resentful) |
| dissatisfaction(noun, disappointment, unhappiness, frustration, discontent) |
| dissenter(original, discontent, liberal, rebel, opponent) |
| firebrand(noun, radical, partisan, reactionary, leftist) |
| grieved(upset, wrong, sorrow, melancholy, resentment) |
| griping(adjective, upset, unhappy, angry, annoyed) |
| grouchy(adjective, annoyed, irritated, grumpy, discontented) |
| insurrectionary(noun, hostile, resistance, rebel, opponent) |
| kicker |
| misery(pain, killjoy, spoilsport) |
| murmurer(noun, grouch) |
| out of humor(expression, adjective, idiom, bad, unhappy) |
| out of humour with(adjective, bad, unhappy, negative) |
| party pooper(noun, expression, killjoy, spoilsport) |
| petulant(annoyed, grumpy, discontented, resentful, testy) |
| revolutionary(adjective, radical, partisan, reactionary, insurgent) |
| revolutionist(noun, resistance, rebel, opponent, recreant) |