| 3 letters |
| ido | 3 |
|
| ugh | 3 |
|
| not | 3 |
|
| ron | 3 |
|
| 4 letters |
| crux | 4 |
|
| knot | 4 |
|
| cato | 4 |
|
| 5 letters |
| canti | 5 |
|
| proof | 5 |
|
| howso | 5 |
|
| poser | 5 |
|
| 6 letters |
| excuse | 6 |
|
| enigma | 6 |
|
| ground | 6 |
|
| puzzle | 6 |
|
| whyfor | 6 |
|
| bother | 6 |
|
| riddle | 6 |
|
| reason | 6 |
|
| 7 letters |
| FLOORER | 7 |
|
| howcome | 7 |
|
| stumper | 7 |
|
| HARBURG | 7 |
|
| for why | 7 |
|
| problem | 7 |
|
| pretext | 7 |
|
| whatfor | 7 |
|
| PUZZLER | 7 |
|
| whyever | 7 |
|
| the why | 7 |
|
| sticker | 7 |
|
| mystery | 7 |
|
| 8 letters |
| what for | 8 |
|
| pretense | 8 |
|
| the idea | 8 |
|
| how come | 8 |
|
| argument | 8 |
|
| POURQUOI | 8 |
|
| question | 8 |
|
| 9 letters |
| conundrum | 9 |
|
| rationale | 9 |
|
| towhatend | 9 |
|
| wherefore | 9 |
|
| for which | 9 |
|
| 10 letters |
| reason for | 10 |
|
| reason why | 10 |
|
| PUZZLEMENT | 10 |
|
| PERPLEXITY | 10 |
|
| 11 letters |
| explanation | 11 |
|
| the whatfor | 11 |
|
| 12 letters |
| nut to crack | 12 |
|
| the big idea | 12 |
|
| stated cause | 12 |
|
| mind boggler | 12 |
|
| knotty point | 12 |
|
| 13 letters |
| brain twister | 13 |
|
| QUESTION MARK | 13 |
|
| jigsaw puzzle | 13 |
|
| mystification | 13 |
|
| the wherefore | 13 |
|
| 14 letters |
| Vexed question | 14 |
|
| Chinese puzzle | 14 |
|
| 15 letters |
| from what cause | 15 |
|
| rational ground | 15 |
|
| on what account | 15 |
|
| 16 letters |
| baffling problem | 16 |
|
| crossword puzzle | 16 |
|
| 17 letters |
| tough proposition | 17 |
|
| underlying reason | 17 |
|
| 18 letters |
| perplexed question | 18 |
|
| enigmatic question | 18 |
|
| 26 letters |
| sixty four dollar question | 26 |
|