2
annexe
2
answer
2
appendage(noun, increase, extra, addition, accessory)
2
appendix(noun, increase, extra, addition, attachment)
2
appurtenance(noun, addition, accessory, attachment, supplement)
2
associate(noun, guide, addition, companion, friend)
2
attachment(noun, addition, accessory, supplement)
2
attribute(accessory, supplement)
2
blend(verb, set, agree, like, combine)
2
boost(verb, increase, develop, improve, expand)
2
coalition(noun, collection, crew)
2
cohort(noun, companion, friend, contemporary, acquaintance)
2
confirmation
2
coordinate(noun, verb, match, engage, blend)
2
corollary(noun, match, equal, comparison, counterpart)
2
correspondent(noun, like, copy, connection, match)
2
crown(verb, complete)
2
element(part, piece)
2
enlarge(verb, increase, develop, improve, expand)
2
enrich(verb, increase, develop, improve, enhance)
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APASmart Define. (2015). complement thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/complement/thesaurus/synonyms
ChicagoSmart Define. 2015. "complement thesaurus" https://smartdefine.org/complement/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, complement thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/complement/thesaurus/synonyms>.
MLASmart Define. "complement thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/complement/thesaurus/synonyms>