| poser(noun, difficulty, challenge, question, secret) |
| enigma(noun, trouble, difficulty, challenge, question) |
| problem(noun, trouble, difficulty, challenge, question) |
| mystery(noun, trouble, difficulty, challenge, question) |
| perplexity(noun, question, secret, puzzle, mystery) |
| puzzle(noun, trouble, difficulty, challenge, question) |
| puzzler(noun, difficulty, challenge, question, problem) |
| sticker |
| toughie |
| brainteaser(noun, difficulty, challenge, question, secret) |
| candidate(noun, person, job) |
| knot(noun, puzzle, riddle, enigma) |
| question(noun, trouble, challenge, secret, puzzle) |
| campaigner |
| puzzlement(noun, question, secret, puzzle, knot) |
| riddle(noun, difficulty, challenge, question, problem) |
| twister(noun, difficulty, challenge, question, problem) |
| vexed question(noun, trouble, challenge, question) |
| butter |
| challenge(noun, question, puzzle, mystery, riddle) |