37 entries under add-on topic. ×

19
addition(noun, increase, delay, development, spread)
17
appendage(noun, end, increase, delay, development)
14
addendum(noun, increase, note, delay, development)
14
adjunct(noun, help, increase, delay, development)
12
supplement(noun, increase, delay, development, spread)
11
extension(noun, increase, spread, extra, addition)
10
suffix(noun, sequel, affix)
8
accessory(noun, adjective, part, extra, addition)
8
affix(noun, addition, extension, addendum)
7
attachment(noun, extra, addition, extension, document)
5
annex(noun, increase, delay, development, spread)
5
tag
3
augmentation(noun, increase, delay, development, spread)
3
enlargement(noun, increase, delay, development, extra)
3
extra(noun, adjective, increase, addition, attachment)
3
increase(noun, delay, development, spread, extra)
2
accession(noun, extra, supplement, appendage)
2
increment(noun, increase, extra, addition, supplement)
1
expansion(noun, increase, delay, development, spread)
1
tab
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APASmart Define. (2015). appendix thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/appendix/thesaurus/synonyms
ChicagoSmart Define. 2015. "appendix thesaurus" https://smartdefine.org/appendix/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, appendix thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/appendix/thesaurus/synonyms>.
MLASmart Define. "appendix thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/appendix/thesaurus/synonyms>