162 entries under substantial topic. ×
| obvious(significant, definite, considerable) | |
| overflowing(adjective, heavy, rich, generous) | |
| plenteous(adjective, great, heavy, rich) | |
| primary(adjective, big, significant, valuable) | |
| principal(adjective, big, significant, valuable) | |
| serious(big, significant, valuable, vital) | |
| decisive(big, significant, valuable, vital) | |
| determining(big, significant, valuable, vital) | |
| distinguished(adjective, famous, significant, familiar, noble) | |
| earnest(big, significant, valuable, vital) | |
| essential(big, significant, valuable, vital) | |
| exceptional(great, big, significant, valuable) | |
| exigent(big, significant, valuable, vital) | |
| fab(outstanding, significant, exciting, impressive) | |
| far-reaching(adjective, spread, big, grand) | |
| fleshy(adjective, big, heavy, awkward) | |
| front-page(big, significant, valuable, vital) | |
| good-sized(significant, definite, generous, considerable) | |
| imperative(big, significant, valuable, vital) | |
| importunate(big, significant, valuable, vital) |
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| APA | Smart Define. (2016). large thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/large/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "large thesaurus" https://smartdefine.org/large/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, large thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/large/thesaurus/synonyms>. |
| MLA | Smart Define. "large thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/large/thesaurus/synonyms> |