244 entries under adjective topic. ×

22
incredible(great, flat, poor, thin)
18
improbable(great, slight, flat, poor)
17
unbelievable(hard, weak, great, flat)
17
preposterous(hard, great, difficult, extraordinary)
16
inconceivable(great, flat, poor, thin)
16
unlikely(slight, extraordinary, strange, superb)
14
farfetched(hard, difficult, likely, unlikely)
13
doubtful(extraordinary, fantastic, amazing, dubious)
13
fantastic(extraordinary, strange, superb, amazing)
12
dubious(great, slight, extraordinary, amazing)
12
unconvincing(weak, great, flat, poor)
10
fishy(extraordinary, fantastic, amazing, doubtful)
10
unthinkable(extraordinary, unusual, strange, amazing)
10
weak(great, poor, extraordinary, strange)
9
extravagant(strange, crazy, insane, absurd)
9
impossible(hard, great, difficult, extraordinary)
8
absurd(hard, difficult, false, strange)
8
far-fetched(hard, extraordinary, fantastic, amazing)
8
unreasonable(hard, poor, difficult, thin)
7
flimsy(weak, poor, thin, unreasonable)
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APASmart Define. (2015). implausible thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/implausible/thesaurus/synonyms
ChicagoSmart Define. 2015. "implausible thesaurus" https://smartdefine.org/implausible/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, implausible thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/implausible/thesaurus/synonyms>.
MLASmart Define. "implausible thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/implausible/thesaurus/synonyms>