Synonyms of why

1 Syllable
sphinx, how, proof
2 Syllables
thrillers, thriller, stumper, cause, rebus, stumpers, teasers, sphinxes, teaser, puzzler, sphinges, puzzlers, chillers
3 Syllables
conundrums, mystery, whodunit, braintwister, brainteaser, mindboggler, mind-twister, mysteries, conundrum, motive
4 Syllables
perplexity, wherefore, abstruseness, perplexities
5 Syllables
abstrusenesses, inscrutableness
6 Syllables
inscrutability