16 entries under adjective topic. ×
| four(noun, four) | |
| quartet(noun, four) | |
| tetrad(noun, four) | |
| fourth | |
| quad(noun, four) | |
| quadruple | |
| quaternate | |
| square | |
| quadrilateral | |
| 4th | |
| quadrangular | |
| quadrigeminal | |
| quarto | |
| rectangular | |
| cubic | |
| tertiary |
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| APA | Smart Define. (2015). quaternary thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/quaternary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "quaternary thesaurus" https://smartdefine.org/quaternary/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, quaternary thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/quaternary/thesaurus/synonyms>. |
| MLA | Smart Define. "quaternary thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/quaternary/thesaurus/synonyms> |