66 entries under substantial topic. ×
| exigent(adjective, serious, essential, vital, feature) | |
| large(adjective, famous, significant, familiar) | |
| marked(adjective, extraordinary, significant, prominent) | |
| of note(expression, adjective, characteristic, idiom, feature) | |
| far-reaching(adjective, characteristic, feature, severe, importance) | |
| noticeable(adjective, solid, extraordinary, unusual, strange) | |
| solid(adjective, outstanding, characteristic, extraordinary, importance) | |
| extensive(adjective, feature, characteristic, trait) | |
| front-page(adjective, feature, characteristic, trait, outstanding) | |
| ponderous(adjective, feature, characteristic, big) | |
| germane(adjective, characteristic, importance, serious) | |
| much(adjective, feature, characteristic, trait, significant) | |
| of moment(adjective, expression, feature, characteristic, trait) | |
| pertinent(adjective, proper, significant, suitable, consistent) | |
| something(adjective, feature, characteristic, big) | |
| appreciable(adjective, significant, large) | |
| heavyweight(adjective, great, big, heavy, significant) | |
| firm(adjective, significant, large, key) | |
| forcible(adjective, strong, energetic, big, heavy) | |
| severe(adjective, tough, big, heavy, deep) |
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| APA | Smart Define. (2016). important thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/important/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "important thesaurus" https://smartdefine.org/important/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, important thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/important/thesaurus/synonyms>. |
| MLA | Smart Define. "important thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/important/thesaurus/synonyms> |