162 entries under noun topic. ×

5
annexe
5
insert(increase, extra, addition, supplement)
4
amendment(act, measure, qualification, provision)
4
auxiliary(addition, attachment, accompaniment)
4
complement(increase, extra, addition, attachment)
4
rider(act, increase, measure, extra)
4
sequel(increase, extra, addition, additive)
3
enlargement(increase, delay, development, extra)
3
epilogue
3
fixture
3
reinforcement(extra, supplement, appendage, adjunct)
3
secondary
3
supplementation
2
accrual(extra, supplement, appendage, add-on)
2
additive(increase, extra, addition, supplement)
2
affix(addition, extension, supplement, adjunct)
2
afterthought(addition, supplement)
2
afterword
2
back matter
2
boost(extra, supplement, appendage, add-on)
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APASmart Define. (2015). addendum thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/addendum/thesaurus/synonyms
ChicagoSmart Define. 2015. "addendum thesaurus" https://smartdefine.org/addendum/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, addendum thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/addendum/thesaurus/synonyms>.
MLASmart Define. "addendum thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/addendum/thesaurus/synonyms>