| annoyance(noun, trouble, worry, blow, distress) |
| bar(difficulty, hindrance, problem, impediment, discouragement) |
| blight |
| bummer(noun, trouble, difficulty, drag, hardship) |
| care(noun, trouble, worry, blow, distress) |
| changeability |
| contrasts |
| conversion(noun, break, change, advance, turn) |
| curse(trouble, difficulty, lack, torment, adversity) |
| downer(noun, trouble, difficulty, drag, hardship) |
| flukiness |
| flux |
| hard knocks(noun, expression, trouble, difficulty, want) |
| hardness(severity, harshness, conformity, strictness, conservatism) |
| irritation(noun, trouble, worry, blow, distress) |
| mischance(trouble, difficulty, lack, torment, adversity) |
| obstacle(noun, difficulty, hindrance, problem, impediment) |
| oscillation |
| pickle(noun, trouble, fix, worry, pass) |
| pinch(noun, trouble, fix, worry, pass) |