151 entries under weak topic. ×

5
weakly(adjective, strong, thin, delicate)
4
aerial(adjective, light, slight, fake)
4
imponderable(adjective, light, slight, negative)
4
sleazy(adjective, slight, thin, feeble)
4
unconvincing(adjective, flat, poor, thin)
3
brittle(adjective, delicate, infirm, flimsy)
3
faint(adjective, dull, light, soft)
3
fly-by-night(adjective, light, slight, short)
3
idle(adjective, light, slight, trivial)
3
inconsiderable(adjective, slight, poor, low)
3
ineffectual(adjective, dull, light, soft)
3
lame(adjective, flat, poor, thin)
3
shallow(adjective, slight, thin, feeble)
3
wispy(adjective, light, thin, delicate)
2
breakable(adjective, delicate, infirm, flimsy)
2
dainty(adjective, light, slight, easy)
2
frangible(adjective, delicate, infirm, flimsy)
2
insufficient(adjective, slight, flat, poor)
2
niggardly(poor, insufficient, scarce)
2
papery(adjective, slight, thin, delicate)
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APASmart Define. (2016). insubstantial thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/insubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "insubstantial thesaurus" https://smartdefine.org/insubstantial/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, insubstantial thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/insubstantial/thesaurus/synonyms>.
MLASmart Define. "insubstantial thesaurus" 30 March 2016. Web. 26 September 2026. <https://smartdefine.org/insubstantial/thesaurus/synonyms>