69 entries under implausible topic. ×

45
weak(adjective, state, strong, light, great)
37
feeble(adjective, strong, light, weak, slight)
25
unsubstantial(adjective, strong, light, weak, great)
23
thin(adjective, light, weak, great, smooth)
20
poor(adjective, light, weak, slight, reasoning)
20
tenuous(adjective, strong, light, weak, slight)
14
trivial(adjective, light, slight, easy, poor)
13
inadequate(adjective, strong, light, thin, useless)
11
lame(adjective, weak, flat, poor, delicate)
11
superficial(adjective, strong, light, slight, thin)
11
unconvincing(adjective, weak, poor, thin, unreasonable)
9
transparent(adjective, strong, light, fine, thin)
9
trifling(adjective, light, slight, easy, poor)
9
unbelievable(adjective, weak, poor, thin, informal)
8
frivolous(adjective, slight, poor, detail, trivial)
8
incredible(adjective, poor, thin, informal, unreasonable)
8
unsatisfactory(adjective, weak, poor, feeble)
8
weakly(adjective, adverb, strong, weak, poor)
7
groundless(adjective, reason, poor, negative, unwarranted)
7
improbable(adjective, poor, thin, informal, unreasonable)
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APASmart Define. (2016). flimsy thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/flimsy/thesaurus/synonyms
ChicagoSmart Define. 2016. "flimsy thesaurus" https://smartdefine.org/flimsy/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, flimsy thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/flimsy/thesaurus/synonyms>.
MLASmart Define. "flimsy thesaurus" 26 January 2016. Web. 20 September 2026. <https://smartdefine.org/flimsy/thesaurus/synonyms>