| lesser | |
| nonessential | |
| one more(expression, adjective, extraordinary, new, spare) | |
| optional(adjective, extraordinary, new, spare, fresh) | |
| ornamental(adjective, accompanying) | |
| over and above(expression, adjective, idiom, extraordinary, new) | |
| peripheral | |
| pertinent(adjective, relational) | |
| related(adjective, relational) | |
| relevant(adjective, relational) | |
| second(adjective, counterfeit, spare, near, reserve) | |
| special(adjective, extraordinary, new, spare, fresh) | |
| subjunctive | |
| subsidiaries | |
| supernumerary(adjective, extraordinary, new, spare, fresh) | |
| supplement | |
| supporting(adjective, additional) | |
| tip(adjective, extraordinary, new, spare, fresh) | |
| ulterior | |
| unimportant |
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| APA | Smart Define. (2015). supplemental thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/supplemental/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "supplemental thesaurus" https://smartdefine.org/supplemental/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, supplemental thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/supplemental/thesaurus/synonyms>. |
| MLA | Smart Define. "supplemental thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/supplemental/thesaurus/synonyms> |