co·nun·drum 
(kə-nŭndrəm)
(kə-nŭndrəm)n.
1. A riddle in which a fanciful question is answered by a pun.
2. A paradoxical, insoluble, or difficult problem; a dilemma: "the conundrum ... of achieving full employment without inflation" (Arthur M. Schlesinger, Jr.)
[Origin unknown.]
- whang
- whangee
- wharf
- wharfage
- wharfinger
- wharf rat
- Wharton
- wharves
- what
- whatchamacallit
- whatever
- what for
- what have you
- what if
- what is is it with
- what it takes
- whatnot
- whatsis
- what's is is it with
- whatsit
- whatsoever
- what's what
- what's what is it with
- what's/what is/what is it with
- what what is it with