- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
350 entries under adjective topic. ×
| frangible(weak, delicate, feeble, infirm) | |
| hallucinatory(strange, negative, fantastic, fantasy) | |
| illusional(strange, fantasy, unreal) | |
| illusionary(strange, fantasy, unreal) | |
| illusive(strange, fantasy, unreal) | |
| imponderable(light, weak, slight, heavenly) | |
| improbable(thin, extraordinary, strange, unreasonable) | |
| inadequate(dull, light, weak, soft) | |
| inconceivable(thin, extraordinary, belief, unreasonable) | |
| pale(dull, light, soft, poor) | |
| phantasmagoric(excellent, gentle, marvelous, vague) | |
| ramshackle | |
| sleazy(weak, slight, thin, feeble) | |
| supernatural(abstract, heavenly, theoretical, immaterial) | |
| unearthly(abstract, heavenly, theoretical, immaterial) | |
| unimportant(weak, soft, gentle, mild) | |
| unworldly(heavenly, immaterial, ghostly, incorporeal) | |
| vague(excellent, gentle, obscure, negative) | |
| weakly(strong, weak, delicate, uncertain) | |
| weightless(light, slight, easy, thin) |
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| APA | Smart Define. (2016). unsubstantial thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unsubstantial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unsubstantial thesaurus" https://smartdefine.org/unsubstantial/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, unsubstantial thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unsubstantial/thesaurus/synonyms>. |
| MLA | Smart Define. "unsubstantial thesaurus" 30 March 2016. Web. 27 September 2026. <https://smartdefine.org/unsubstantial/thesaurus/synonyms> |