10
rise(noun, advance, increase, raise, boost)
10
wing(noun, increase, delay, development, spread)
9
boost(noun, advance, increase, raise, rise)
9
raise(noun, verb, advance, increase, position)
8
accompaniment(noun, rest, match, balance, extra)
8
accumulation(noun, advance, increase, raise, rise)
8
annexation(noun, process, capture, seizure, joining)
8
appurtenance(noun, part, extra, extension, accessory)
8
expansion(noun, advance, increase, raise, delay)
7
accrual(noun, advance, increase, raise, rise)
7
reckoning(noun, mark, total, process, estimate)
7
reinforcement(noun, advance, increase, rise, progress)
6
add-on(noun, increase, extra, attachment, decoration)
6
admixture(noun, annexation)
6
advance(noun, increase, progress, development, boost)
6
complement(noun, increase, match, extra, foil)
6
inclusion(noun, process, supplement, presence, adding)
6
insert(noun, increase, extra, supplement, additive)
5
additive(noun, increase, extra, enlargement, ingredient)
5
adding(noun, process, account, estimate, capture)
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APASmart Define. (2015). addition thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/addition/thesaurus/synonyms
ChicagoSmart Define. 2015. "addition thesaurus" https://smartdefine.org/addition/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, addition thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/addition/thesaurus/synonyms>.
MLASmart Define. "addition thesaurus" 22 December 2015. Web. 21 September 2026. <https://smartdefine.org/addition/thesaurus/synonyms>