350 entries under adjective topic. ×

2
rotten(bad, false, uncertain, feeble)
2
sheer(light, weak, slight, easy)
2
strange(extraordinary, fantasy, unreal, unbelievable)
2
subtile(fine, thin, delicate, slim)
2
subtle(fine, thin, delicate, slim)
2
superficial(weak, soft, gentle, thin)
2
surreal(strange, fantasy, unreal)
2
uncertain(feeble, doubtful, hesitant, sluggish)
2
unconceivable(likely, implausible)
2
uncorporal(body, immaterial)
2
undependable(uncertain, feeble, shaky, hesitant)
2
useless(trivial, insufficient, hopeless, pointless)
2
wasted(uncertain, feeble, useless, hesitant)
2
weakened(uncertain, feeble, shaky, hesitant)
2
weird(strange, fantasy, imaginary, unreal)
2
white(dull, light, soft, poor)
2
wimpy(weak, thin, delicate, feeble)
1
tender(weak, delicate, uncertain, feeble)
1
agile(light, slight, easy, thin)
1
ailing(weak, delicate, false, unstable)
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APASmart Define. (2016). unsubstantial thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unsubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsubstantial thesaurus" https://smartdefine.org/unsubstantial/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unsubstantial thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unsubstantial/thesaurus/synonyms>.
MLASmart Define. "unsubstantial thesaurus" 30 March 2016. Web. 27 September 2026. <https://smartdefine.org/unsubstantial/thesaurus/synonyms>