| blockade(difficulty, problem, disadvantage, bug, impediment) |
| botherer |
| braintwister(noun, difficulty, question, puzzle, perplexity) |
| brake(difficulty, problem, disadvantage, bug, impediment) |
| bug(difficulty, problem, disadvantage, impediment, hitch) |
| bugaboo(noun, challenge, question, puzzle, example) |
| charade(noun, difficulty, question, puzzle, mystery) |
| chiller(noun, difficulty, question, puzzle, mystery) |
| cliff-hanger(noun, challenge, question, puzzle, example) |
| clog(difficulty, problem, disadvantage, bug, impediment) |
| confidential information(expression, perplexity, abstruseness, inscrutableness) |
| contrived |
| coquette |
| crimp(difficulty, problem, disadvantage, bug, impediment) |
| cropper(difficulty, problem, disadvantage, bug, impediment) |
| crossword |
| cruces |
| crunch(difficulty, problem, bug, impediment, hitch) |
| curb(difficulty, problem, disadvantage, bug, impediment) |
| deception(noun, trick, snag, drawback) |