| upturn(noun, advance, increase, raise, rise) | |
| aggregation(noun, growth, quantity, pile, gathering) | |
| cast | |
| additament | |
| amendment(noun, alteration, variation, modification, revolution) | |
| approximation | |
| arithmetic(noun, account, estimate, calculation, mathematics) | |
| as well(expression, idiom) | |
| augment(verb, adjunct) | |
| beyond | |
| calculation(noun, account, estimate, reckoning, computation) | |
| codicil(noun, part, increase, extra, qualification) | |
| commission(noun, advantage, extra, enlargement, plus) | |
| computation(noun, estimate, calculation, reckoning, sums) | |
| differentiation | |
| dividend(noun, advance, increase, advantage, extra) | |
| division(section, extension, annex, calculation, reckoning) | |
| garnish(noun, accessory, supplement, accompaniment, adjunct) | |
| innovation(noun, break, change, advance, turn) | |
| insertion(noun, increase, lead, opening, launch) |
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| APA | Smart Define. (2015). addition thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/addition/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "addition thesaurus" https://smartdefine.org/addition/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, addition thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/addition/thesaurus/synonyms>. |
| MLA | Smart Define. "addition thesaurus" 22 December 2015. Web. 23 September 2026. <https://smartdefine.org/addition/thesaurus/synonyms> |