106 entries under extra topic. ×

22
increase(noun, verb, advance, delay, rise)
20
addendum(noun, increase, delay, development, spread)
19
supplement(noun, part, increase, delay, rise)
18
augmentation(noun, advance, increase, raise, delay)
17
gain(noun, advance, increase, raise, rise)
17
extension(noun, part, increase, raise, rise)
17
increment(noun, advance, increase, raise, gain)
16
accessory(noun, adjective, part, ornament)
16
adjunct(noun, part, increase, delay, development)
13
appendix(noun, increase, delay, development, spread)
13
attachment(noun, process, capture, extension)
12
appendage(noun, part, increase, delay, development)
12
accession(noun, advance, increase, raise, rise)
11
annex(noun, part, increase, delay, development)
11
plus(noun, advantage)
10
enlargement(noun, advance, increase, raise, delay)
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)
10 years ago|19k views|share |citing 
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>