| ongoing conundrum(noun, expression, challenge, mystery, riddle) |
| real conundrum(noun, expression, challenge, usage, mystery) |
| scientific conundrum(noun, expression, challenge, usage, mystery) |
| serious conundrum(noun, expression, challenge, usage, mystery) |
| similar conundrum(noun, expression, challenge, usage, mystery) |
| speculative conundrum(noun, expression, challenge, usage, mystery) |
| standing conundrum(noun, expression, challenge, usage, mystery) |
| strange conundrum(noun, expression, challenge, usage, mystery) |
| strategic conundrum(noun, expression, challenge, usage, mystery) |
| terrible conundrum(noun, expression, challenge, usage, mystery) |
| theological conundrum(noun, expression, challenge, usage, mystery) |
| theoretical conundrum(noun, expression, challenge, usage, mystery) |
| ultimate conundrum(noun, expression, challenge, usage, mystery) |
| unanswerable conundrum(noun, expression, challenge, usage, mystery) |
| unresolved conundrum(noun, expression, challenge, usage, mystery) |
| unsolved conundrum(noun, expression, challenge, usage, mystery) |
| vexing conundrum(noun, expression, challenge, usage, mystery) |
| visual conundrum(noun, expression, challenge, usage, mystery) |
| answer to that conundrum(expression, difficulty, question, puzzle) |
| bawdy conundrum(expression, difficulty, question, puzzle) |