102 entries under significant topic. ×
| grass-roots(important, original, basic, vital) | |
| heavy(important, large, essential, critical) | |
| imperative(important, essential, critical, basic) | |
| major-league(important, large, considerable) | |
| meat-and-potatoes(important, original, essential, critical) | |
| radical(important, original, essential, basic) | |
| salient(important, vital, main, middle) | |
| structural(important, original, basic, vital) | |
| substratal(adjective, important, original, essential) | |
| substrative(important, original, basic, vital) | |
| supporting(important, original, basic, vital) | |
| sustaining(important, original, basic, vital) | |
| theoretical(important, original, basic, vital) | |
| underived(important, original, basic, vital) | |
| urgent(important, essential, critical, basic) | |
| valuable(large, vital, considerable, imperative) | |
| abundant(large, considerable) | |
| ample(large, considerable) | |
| big-deal(large, considerable) | |
| bottom line(expression, important, essential, basic) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |