Synonyms|607Antonyms|112|Broader|9Narrower|11Related|650

3 entries under unsound topic. ×

6
credible(adjective, unbelievable, believable)
4
practical(adjective, reasonable, sensible, unreasonable, useful)
1
hardboiled
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APASmart Define. (2016). impossible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impossible/thesaurus/antonyms
ChicagoSmart Define. 2016. "impossible thesaurus" https://smartdefine.org/impossible/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, impossible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impossible/thesaurus/antonyms>.
MLASmart Define. "impossible thesaurus" 9 March 2016. Web. 25 September 2026. <https://smartdefine.org/impossible/thesaurus/antonyms>