| suffixed(adjective, attached) | |
| summational | |
| summative | |
| superadded | |
| surrogate(adjective, extra, auxiliary, supernumerary) | |
| swollen(adjective, increased) | |
| tip(adjective, extraordinary, new, spare, fresh) | |
| ulterior | |
| uncalled for(verb, expression, phrasal verb, casual, redundancy) | |
| uncritical(adjective, casual, useless, extra, worthless) | |
| undesirable(adjective, casual, useless, extra, worthless) | |
| unimportant(adjective, place, lower, inferior, extra) | |
| unrequired(adjective, extra, unnecessary, pointless, superfluous) | |
| unused(adjective, extraordinary, new, spare, fresh) | |
| useless(adjective, casual, extra, worthless, unwarranted) | |
| vanguard | |
| wider(new, extra, greater, supplementary) | |
| worthless(adjective, casual, useless, extra, unwarranted) | |
| accession | |
| accessional |
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| APA | Smart Define. (2015). additional thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/additional/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "additional thesaurus" https://smartdefine.org/additional/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, additional thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/additional/thesaurus/synonyms>. |
| MLA | Smart Define. "additional thesaurus" 30 July 2015. Web. 22 September 2026. <https://smartdefine.org/additional/thesaurus/synonyms> |