Synonyms|73Antonyms|32|Broader|0Narrower|0Related|34
9
insoluble(adjective, unable, unfathomable, answered, solved)
7
insolvable
6
inexplicable(adjective, obscure, explanation, mysterious, unfathomable)
6
inextricable(adjective, solved)
6
unresolvable(adjective, unfathomable)
5
inscrutable(adjective, solved)
5
mysterious
5
unsoluble
4
irresolvable
3
impossible
3
incomprehensible(adjective, unfathomable)
2
baffling
2
difficult
2
enigmatic
2
hard
2
hopeless
2
indecipherable
2
indissoluble
2
insuperable
2
mystifying
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APASmart Define. (2015). unsolvable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unsolvable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsolvable thesaurus" https://smartdefine.org/unsolvable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, unsolvable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unsolvable/thesaurus/synonyms>.
MLASmart Define. "unsolvable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/unsolvable/thesaurus/synonyms>