- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
54 entries under extraordinary topic. ×
| flimsy(adjective, strong, light, weak, great) | |
| weak(adjective, dull, strong, light, great) | |
| thin(adjective, dull, light, weak, great) | |
| unbelievable(adjective, strange, unreasonable, fantasy) | |
| fantastic(adjective, gentle, strange, fantasy) | |
| implausible(adjective, thin, strange, unreasonable) | |
| incredible(adjective, strange, unreasonable, fantasy) | |
| unconvincing(adjective, thin, strange, unreasonable) | |
| improbable(adjective, thin, strange, unreasonable) | |
| inconceivable(adjective, thin, belief, unreasonable) | |
| thick(adjective, thin, unreasonable, amazing) | |
| rare(adjective, fine, thin, strange) | |
| doubtful(unreasonable, amazing, dubious, unlikely) | |
| dubious(unreasonable, amazing, doubtful, unlikely) | |
| preposterous(adjective, amazing, irrational, implausible) | |
| strange(adjective, fantasy, unreal, unbelievable) | |
| beyond belief(expression, amazing, implausible, incredible) | |
| cockamamie(amazing, incredible) | |
| cockeyed(amazing, irrational, incredible, unreasoned) | |
| far-fetched(amazing, doubtful, unlikely, implausible) |
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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> |