Synonyms|325Antonyms|151|Broader|5Narrower|3Related|712
2
unrealistic(adjective, practical, believable)
2
unsustainable
1
absurd
1
amazing
1
derisory
1
fanciful
1
farfetched(adjective, unbelieveable)
1
fictional
1
fictitious
1
flimsy
1
hopeless
1
impractical
1
incredulous
1
marvelous(adjective, hard, amazing)
1
surreal
1
unbelieveable(adjective, unreasonable, unbelievable)
1
uncertain
1
unsure
0
Greek
0
altitudinous
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APASmart Define. (2015). believable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/believable/thesaurus/antonyms
ChicagoSmart Define. 2015. "believable thesaurus" https://smartdefine.org/believable/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, believable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/believable/thesaurus/antonyms>.
MLASmart Define. "believable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/believable/thesaurus/antonyms>