78 entries under implausible topic. ×

0
frivolous(poor, unconvincing)
0
groundless(poor, unconvincing)
0
hundred-to-one(doubtful, unlikely)
0
iffy(doubtful, unlikely)
0
imcomprehensible(extraordinary, strange, unbelievable, unthinkable)
0
impracticable(doubtful, unlikely)
0
inane(poor, unconvincing)
0
not expected(expression, doubtful, unlikely)
0
outside chance(expression, doubtful, dubious, unlikely)
0
puerile(poor, unconvincing)
0
slim(adjective, poor, thin, small, inadequate)
0
slim and none(expression, idiom, doubtful, unlikely)
0
tenuous(poor, unconvincing)
0
trifling(poor, unconvincing)
0
trivial(poor, unconvincing)
0
ungrounded(poor, unconvincing)
-1
weakly(poor, unconvincing)
-1
wishful(poor, unconvincing)
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APASmart Define. (2016). incredible thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/incredible/thesaurus/synonyms
ChicagoSmart Define. 2016. "incredible thesaurus" https://smartdefine.org/incredible/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, incredible thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/incredible/thesaurus/synonyms>.
MLASmart Define. "incredible thesaurus" 30 March 2016. Web. 24 September 2026. <https://smartdefine.org/incredible/thesaurus/synonyms>