102 entries under addition topic. ×

4
compass(noun, verb, hold, take, make)
4
complement(noun, increase, extra, adjunct)
4
continuation(noun, increase, delay, development, spread)
3
appurtenance(noun, part, extra, extension)
3
fixture(noun, part, extra, extension)
3
prolongation(noun, increase, delay, development, spread)
3
superpose
2
additive(noun, increase, extra, supplement)
2
branch(noun, increase, delay, development, spread)
2
elongation(noun, increase, delay, development, spread)
2
enlargement(noun, increase, delay, development, extra)
2
reach(noun, verb, take, make, get)
2
saddle with(verb, phrasal verb)
2
span(noun, verb, increase, touch, delay)
2
subsidiary(noun, increase, division, extra)
2
superadd
1
additional room(noun, expression, idiom, extension)
1
amplification(noun, increase, delay, development, spread)
1
ancillary(noun, adjective, attachment)
1
auxiliary(noun, adjective, part, extra)
10 years ago|13k views|share |citing 
APASmart Define. (2015). annex thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/annex/thesaurus/synonyms
ChicagoSmart Define. 2015. "annex thesaurus" https://smartdefine.org/annex/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, annex thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/annex/thesaurus/synonyms>.
MLASmart Define. "annex thesaurus" 22 December 2015. Web. 28 September 2026. <https://smartdefine.org/annex/thesaurus/synonyms>