- Definitions|1
- Thesaurus|184
- Abbreviations|0
32 entries under adjective topic. ×
| principal(important, foremost, second-to-none) | |
| arterial | |
| central | |
| chief | |
| foremost | |
| grand | |
| main | |
| astral | |
| crucial | |
| dominant | |
| great | |
| nuclear | |
| overriding | |
| paramount | |
| pivotal | |
| pre-eminent(foremost, second-to-none) | |
| predominant | |
| preponderant | |
| prevailing | |
| primal |
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| APA | Smart Define. (2015). mainline thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/mainline/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mainline thesaurus" https://smartdefine.org/mainline/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, mainline thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/mainline/thesaurus/synonyms>. |
| MLA | Smart Define. "mainline thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/mainline/thesaurus/synonyms> |