| subsidiary(noun, increase, extra, extension, additive) | |
| synthesis | |
| to boot | |
| totalization(noun, act, increase, process) | |
| transformation(noun, break, change, advance, turn) | |
| trimming(noun, verb, extra, accessory, decoration) | |
| unification | |
| union | |
| uniting | |
| up(noun, advance, increase, rise, advantage) | |
| upping(noun, advance, increase, rise, progress) | |
| waxing(noun, advance, increase, raise, rise) | |
| widening(noun, increase, delay, development, spread) | |
| winning(noun, gain, achievement, recovery, attainment) | |
| admittance(noun, lead, beginning, opening, launch) | |
| about-face(noun, break, change, advance, turn) | |
| accidental | |
| accruement | |
| accruing(noun, process, adding, totaling, toting) | |
| accrument(noun, increase, rise) |
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| APA | Smart Define. (2015). addition thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/addition/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "addition thesaurus" https://smartdefine.org/addition/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, addition thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/addition/thesaurus/synonyms>. |
| MLA | Smart Define. "addition thesaurus" 22 December 2015. Web. 20 September 2026. <https://smartdefine.org/addition/thesaurus/synonyms> |