69 entries under important topic. ×
| first(adjective, significant, original, sophisticated) | |
| grass-roots(adjective, significant, original, essential) | |
| indispensable(adjective, significant, original, essential) | |
| meat-and-potatoes(adjective, base, significant, last) | |
| necessary(adjective, significant, original, essential) | |
| outstanding(great, significant, serious, main) | |
| requisite(adjective, significant, original, essential) | |
| structural(original, basic, vital, primary) | |
| substratal(adjective, significant, original, essential) | |
| substrative(adjective, significant, original, essential) | |
| supporting(adjective, significant, original, essential) | |
| sustaining(adjective, significant, original, essential) | |
| theoretical(adjective, significant, original, essential) | |
| underived(adjective, significant, original, essential) | |
| bottom line(expression, significant, essential, basic) | |
| dangerous(great, serious) | |
| grave(great, serious) | |
| grievous(great, serious) | |
| heavyweight(great, serious) | |
| influential(great, serious, innovative) |
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| APA | Smart Define. (2016). radical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/radical/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "radical thesaurus" https://smartdefine.org/radical/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, radical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/radical/thesaurus/synonyms>. |
| MLA | Smart Define. "radical thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/radical/thesaurus/synonyms> |