| bitter(adjective, upset, mean, bad, strong) |
| harsh(adjective, hard, tough, severe, taste) |
| sullen(adjective, upset, happy, feelings, sadness) |
| cross(noun, adjective, difficult, feelings, gloomy) |
| dour(adjective, mean, tough, severe, nasty) |
| glum(adjective, happy, feelings, sadness, gloom) |
| gloomy(adjective, happy, feelings, sadness, gloom) |
| morose(adjective, happy, feelings, sadness, depressed) |
| peevish(adjective, difficult, feelings, hostile, irritable) |
| sharp(adjective, strong, hard, severe, rough) |
| tart(noun, adjective, strong, taste, sharp) |
| caustic(adjective, strong, severe, sharp, nasty) |
| rancid(adjective, taste, nasty, unpleasant, rank) |
| surly(adjective, mean, tough, nasty, low) |
| grouchy(adjective, tough, low, difficult, sad) |
| moody(adjective, happy, feelings, sadness, gloom) |
| irritable(adjective, low, difficult, sad, cross) |
| sulky(adjective, happy, feelings, sadness, gloom) |
| acerbic(adjective, taste, sharp, harsh, irritable) |
| acrid(adjective, strong, hard, tough, severe) |