1
fly-by-night(uncertain, doubtful, unsure)
1
grotesque
1
happen
1
hardly possible
1
heavy
1
hesitant(uncertain, doubtful, unsure)
1
heterogeneously
1
idealistic(adjective, improbable)
1
iffy(uncertain, doubtful, shaky, unsure, implausible)
1
ill-adapted(adjective, inadequate, useless, inappropriate, unhealthy)
1
ill-equipped(adjective, inadequate, useless, inappropriate, unhealthy)
1
ill-suited(adjective, inadequate, useless, inappropriate, unhealthy)
1
illogical
1
imaginary(adjective, strange, fantastic, weird, eccentric)
1
imcomprehensible(extraordinary, strange, unbelievable, implausible, unthinkable)
1
implausibly(adverb, improbably)
1
impossibilities
1
improper(adjective, inadequate, useless, inappropriate, unhealthy)
1
inadequate(useless, inappropriate, unhealthy, unsuitable, unsuited)
1
inapplicable(adjective, inadequate, useless, inappropriate, unhealthy)
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APASmart Define. (2015). unlikely thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unlikely/thesaurus/synonyms
ChicagoSmart Define. 2015. "unlikely thesaurus" https://smartdefine.org/unlikely/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unlikely thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unlikely/thesaurus/synonyms>.
MLASmart Define. "unlikely thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unlikely/thesaurus/synonyms>