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

201 entries under adjective topic. ×

1
egregious(intolerable, ungovernable)
1
enigmatic
1
fallacious
1
fishy(extraordinary, unreasonable, amazing, dubious)
1
foolish
1
hardly possible(expression, inaccessible, unreachable, unfeasible)
1
ideal(perfect, heavenly, imaginary, lofty)
1
idealistic(perfect, wild, unreasonable, useless)
1
idiotic
1
impervious
1
inane
1
ineffable
1
invalid
1
mad
1
meaningless
1
mind-boggling(extraordinary, strange, amazing, unbelievable)
1
mysterious
1
not feasible(expression, idiom, difficulty, impractical)
1
ornery(support, attitude)
1
otherworldly(perfect, wild, unreasonable, useless)
For more, visit Impossible on Power Thesaurus
10 years ago|14k views|share |citing 
APASmart Define. (2016). impossible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impossible/thesaurus/synonyms
ChicagoSmart Define. 2016. "impossible thesaurus" https://smartdefine.org/impossible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, impossible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impossible/thesaurus/synonyms>.
MLASmart Define. "impossible thesaurus" 9 March 2016. Web. 23 September 2026. <https://smartdefine.org/impossible/thesaurus/synonyms>