162 entries under noun topic. ×

2
companion
2
enclosure
2
enhancement(increase, extra, addition, supplement)
2
expansion(increase, delay, development, spread)
2
gain(extra, supplement, appendage, add-on)
2
garnish(accompaniment, adjunct)
2
raise(extra, supplement, appendage, add-on)
2
rise(extra, supplement, appendage, add-on)
2
subscript
2
subsidiary(increase, extra, addition, extension)
1
accumulation
1
add-on(increase, extra, addition, attachment)
1
adornment
1
amalgamation
1
amplification(increase, delay, development, spread)
1
arm(increase, delay, development, spread)
1
bonus(extra, addition, supplement, appendage)
1
branch(increase, delay, development, spread)
1
broadening(increase, delay, development, spread)
1
brother
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APASmart Define. (2015). addendum thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/addendum/thesaurus/synonyms
ChicagoSmart Define. 2015. "addendum thesaurus" https://smartdefine.org/addendum/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, addendum thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/addendum/thesaurus/synonyms>.
MLASmart Define. "addendum thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/addendum/thesaurus/synonyms>