58 entries under unlikely topic. ×

1
pending(open, uncertain, shaky, vague, unsure)
1
slim(doubtful, implausible)
1
slim and none(expression, idiom, doubtful, implausible)
1
sneaky(shaky, unpromising)
1
unconvincing(doubtful, implausible)
1
uneasy(shaky, unpromising)
1
unheard of(expression, doubtful, implausible)
1
unsubstantial(doubtful, implausible)
1
up for grabs(expression, adjective, idiom, uncertain, nervous)
0
fanciful(doubtful, implausible)
0
implausible
0
impracticable(doubtful, implausible)
0
inconceivable(doubtful, implausible)
0
incredible(doubtful, implausible)
0
rare(doubtful, implausible)
0
unbelievable(doubtful, implausible)
0
unimaginable(doubtful, implausible)
0
unpromising
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APASmart Define. (2015). iffy thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/iffy/thesaurus/synonyms
ChicagoSmart Define. 2015. "iffy thesaurus" https://smartdefine.org/iffy/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, iffy thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/iffy/thesaurus/synonyms>.
MLASmart Define. "iffy thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/iffy/thesaurus/synonyms>