Synonyms|291Antonyms|5|Broader|0Narrower|0Related|48

25 entries under implausible topic. ×

1
unsubstantial(doubtful, unlikely)
1
weak(doubtful, unlikely)
0
fanciful(doubtful, unlikely)
0
impracticable(doubtful, unlikely)
0
incredible(extraordinary, unusual, wonderful, exceptional, doubtful)
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APASmart Define. (2013). unheard of thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unheard_of/thesaurus/synonyms
ChicagoSmart Define. 2013. "unheard of thesaurus" https://smartdefine.org/unheard_of/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2013, unheard of thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unheard_of/thesaurus/synonyms>.
MLASmart Define. "unheard of thesaurus" 19 May 2013. Web. 26 September 2026. <https://smartdefine.org/unheard_of/thesaurus/synonyms>