90 entries under important topic. ×
| monumental | |
| name-of-the-game(essential, critical, basic, fundamental) | |
| needed(essential, critical, basic, fundamental) | |
| nitty-gritty(adjective, essential, critical, basic) | |
| prerequisite(essential, critical, basic, fundamental) | |
| radical(significant, original, essential, basic) | |
| required(essential, critical, basic, fundamental) | |
| salient(significant, vital, main, middle) | |
| structural(significant, original, basic, vital) | |
| substratal(adjective, significant, original, essential) | |
| substrative(significant, original, basic, vital) | |
| supporting(significant, original, basic, vital) | |
| sustaining(significant, original, basic, vital) | |
| theoretical(significant, original, basic, vital) | |
| underived(significant, original, basic, vital) | |
| underlined(essential, critical, basic, fundamental) | |
| urgent(significant, essential, critical, basic) | |
| world-shaking | |
| all-consuming | |
| bottom line(expression, significant, essential, basic) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |