59 entries under original topic. ×
| least(adjective, head, beginning, opening) | |
| meat-and-potatoes(important, significant, essential, critical) | |
| opening(adjective, head, beginning, prime) | |
| pioneer(adjective, head, beginning, opening) | |
| preeminent(outstanding, serious, prominent, basic) | |
| primogenial(adjective, head, beginning, opening) | |
| pristine(adjective, head, beginning, opening) | |
| radical(important, significant, essential, basic) | |
| slightest(adjective, head, beginning, opening) | |
| smallest(adjective, head, beginning, opening) | |
| structural(important, significant, basic, vital) | |
| substratal(adjective, important, significant, essential) | |
| substrative(important, significant, basic, vital) | |
| supporting(important, significant, basic, vital) | |
| supreme(adjective, superior, outstanding, prominent) | |
| sustaining(important, significant, basic, vital) | |
| theoretical(important, significant, basic, vital) | |
| underived(important, significant, basic, vital) | |
| deep(basic, primary) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |