- Definitions|2
- Thesaurus|4.1k
- Abbreviations|0
15 entries under substantial topic. ×
| important(adjective, serious, valuable) | |
| significant(adjective, important, unimportant, serious) | |
| major(adjective, dull, big, serious) | |
| consequential(adjective, small, serious) | |
| essential(adjective, serious) | |
| weighty(adjective, light, important, serious) | |
| serious(adjective, weighty, crucial) | |
| meaningful(adjective, serious, little, meaningless) | |
| useful(adjective, serious) | |
| valuable(adjective, serious) | |
| worthwhile(adjective, serious) | |
| relevant(adjective, insignificant, serious, unrelated) | |
| necessary(adjective, unimportant, serious) | |
| pertinent(adjective, serious) | |
| uncommon(adjective, serious) |
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| APA | Smart Define. (2015). trivial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/trivial/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "trivial thesaurus" https://smartdefine.org/trivial/thesaurus/antonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, trivial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/trivial/thesaurus/antonyms>. |
| MLA | Smart Define. "trivial thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/trivial/thesaurus/antonyms> |