Synonyms|536Antonyms|85|Broader|10Narrower|9Related|481
11
unlikely(adjective, reasonable, likely)
7
doubtful
6
improbable(adjective, likely, unlikely)
5
impossible
4
inconceivable
3
unbelievable
2
incredible
2
dubious(adjective, clear, honest)
1
implausible
1
fantastic
1
fishy(adjective, doubtful, suspicious)
1
flimsy
1
unimaginable
1
unthinkable
0
amazing
0
cute
0
far-fetched
0
hopeless
0
outlandish
0
outstanding
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APASmart Define. (2015). probable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/probable/thesaurus/antonyms
ChicagoSmart Define. 2015. "probable thesaurus" https://smartdefine.org/probable/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, probable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/probable/thesaurus/antonyms>.
MLASmart Define. "probable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/probable/thesaurus/antonyms>