| problem(noun, difficulty, challenge, question, disadvantage) |
| knot(noun, difficulty, puzzle, impediment) |
| catch(noun, difficulty, trick, problem, disadvantage) |
| difficulty(noun, challenge, question, problem) |
| drawback(noun, difficulty, problem, disadvantage) |
| obstacle(noun, difficulty, problem, disadvantage) |
| stumbling block(noun, expression, difficulty, trick, problem) |
| bar(difficulty, problem, disadvantage, impediment) |
| barrier(difficulty, problem, disadvantage, impediment) |
| blockade(difficulty, problem, disadvantage, impediment) |
| brake(difficulty, problem, disadvantage, impediment) |
| clog(difficulty, problem, disadvantage, impediment) |
| crimp(difficulty, problem, disadvantage, impediment) |
| cropper(difficulty, problem, disadvantage, impediment) |
| crunch(difficulty, problem, impediment, hitch) |
| curb(difficulty, problem, disadvantage, impediment) |
| disadvantage(difficulty, problem, impediment, hitch) |
| drag(difficulty, problem, disadvantage, impediment) |
| fix(difficulty, problem, impediment, hitch) |
| glitch(difficulty, problem, disadvantage, impediment) |