57 entries under question topic. ×

57
enigma(noun, trouble, show, difficulty, challenge)
52
conundrum(noun, trouble, show, difficulty, challenge)
34
mystery(noun, trouble, show, difficulty, challenge)
33
puzzle(noun, trouble, show, difficulty, challenge)
27
problem(noun, trouble, difficulty, challenge)
25
brain-teaser(noun, trouble, challenge, puzzle)
21
closed book(noun, expression, idiom, trouble, challenge)
21
poser(noun, trouble, difficulty, challenge)
20
secret(noun, trouble, challenge, puzzle)
11
puzzlement(noun, trouble, challenge, secret)
10
paradox(noun, trouble, challenge, puzzle)
9
dilemma(noun, trouble, challenge, puzzle)
9
mystification(noun, trouble, challenge, secret)
8
brainteaser(noun, difficulty, challenge, secret)
6
charade(noun, difficulty, secret, puzzle)
6
rebus(noun, difficulty, secret, puzzle)
6
whodunit(noun, difficulty, secret, puzzle)
6
why(noun, trouble, challenge, secret)
5
cryptogram(noun, difficulty, secret, puzzle)
5
perplexity(noun, show, secret, puzzle)
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APASmart Define. (2016). riddle thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/riddle/thesaurus/synonyms
ChicagoSmart Define. 2016. "riddle thesaurus" https://smartdefine.org/riddle/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, riddle thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/riddle/thesaurus/synonyms>.
MLASmart Define. "riddle thesaurus" 1 April 2016. Web. 20 September 2026. <https://smartdefine.org/riddle/thesaurus/synonyms>