| kraken |
| mermaid |
| merman |
| mindboggler(difficulty, question, secret, puzzle, perplexity) |
| monitor |
| mystification(question, secret, puzzle, obscurity, knot) |
| occult(difficulty, question, secret, puzzle, perplexity) |
| oracle(difficulty, question, secret, puzzle, obscurity) |
| perplexity(noun, difficulty, question, secret, puzzle) |
| poser(difficulty, question, secret, puzzle, obscurity) |
| problem(difficulty, question, secret, puzzle, knot) |
| puzzle(difficulty, question, problem, secret, obscurity) |
| puzzlement(question, secret, puzzle, obscurity, knot) |
| puzzler(difficulty, question, problem, puzzle, perplexity) |
| question(difficulty, secret, puzzle, obscurity, knot) |
| rebus(difficulty, question, secret, puzzle, perplexity) |
| roc |
| rune(difficulty, question, secret, puzzle, perplexity) |
| secrecy(difficulty, question, secret, puzzle, obscurity) |
| stickler(difficulty, question, secret, puzzle, knot) |