484 entries under noun topic. ×

22
increase(verb, advance, delay, rise)
20
addendum(increase, delay, development, spread)
19
supplement(part, increase, delay, rise)
18
augmentation(advance, increase, raise, delay)
17
gain(advance, increase, raise, rise)
17
extension(part, increase, raise, rise)
17
increment(advance, increase, raise, gain)
16
extra(adjective, part, increase, advantage)
16
accessory(adjective, part, extra, ornament)
16
adjunct(part, increase, delay, development)
13
appendix(increase, delay, development, spread)
13
attachment(process, capture, extra, extension)
12
appendage(part, increase, delay, development)
12
accession(advance, increase, raise, rise)
12
summation(act, increase, mark, total)
11
acquisition(advance, increase, advantage, improvement)
11
annex(part, increase, delay, development)
11
plus(advantage, extra)
10
accretion(advance, increase, raise, rise)
10
enlargement(advance, increase, raise, delay)
<12345…10>
10 years ago|19k views|share |citing 
APASmart Define. (2015). addition thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/addition/thesaurus/synonyms
ChicagoSmart Define. 2015. "addition thesaurus" https://smartdefine.org/addition/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, addition thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/addition/thesaurus/synonyms>.
MLASmart Define. "addition thesaurus" 22 December 2015. Web. 26 September 2026. <https://smartdefine.org/addition/thesaurus/synonyms>