1. (n.) A kind of riddle based upon some fanciful or fantastic resemblance between things quite unlike; a puzzling question, of which the answer is or involves a pun.

2. (n.) A question to which only a conjectural answer can be made.

abuse of terms acrostic amphibologism amphiboly calembour charade conundrum corruption equivocality equivoque jeu de mots logogram logogriph malapropism metagram missaying palindrome paronomasia play on words pun punning rebus riddle spoonerism wordplay