- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
350 entries under adjective topic. ×
| fleeting | |
| futile(hopeless, pointless) | |
| gossamer(weak, slight, thin, feeble) | |
| hallucinational(strange, fantasy, unreal) | |
| hallucinative(strange, fantasy, unreal) | |
| ideal(fantastic, abstract, imaginary, unreal) | |
| inane(substance, shadowy) | |
| incongruous(false, strange, fantasy, insane) | |
| lame(weak, flat, poor, thin) | |
| languid(uncertain, feeble, shaky, hesitant) | |
| little(light, weak, slight, easy) | |
| makeshift(poor, uncertain, feeble, hesitant) | |
| meager(light, weak, slight, easy) | |
| minor(weak, soft, gentle, mild) | |
| nonexistent(fantastic, real, imaginary, unreal) | |
| notional(fantastic, imaginary, unreal, theoretical) | |
| nugatory(unimportant, useless, trivial, minor) | |
| obscure(unreasonable, vague, dubious, unlikely) | |
| preposterous(extraordinary, amazing, irrational, implausible) | |
| rocky(uncertain, feeble, shaky, hesitant) |
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| APA | Smart Define. (2016). unsubstantial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unsubstantial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unsubstantial thesaurus" https://smartdefine.org/unsubstantial/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, unsubstantial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unsubstantial/thesaurus/synonyms>. |
| MLA | Smart Define. "unsubstantial thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/unsubstantial/thesaurus/synonyms> |