65 entries under noun topic. ×

2
increment
2
non-essential
2
reinforcement
2
spear-carrier
2
trouper
2
understudy
1
emergency(adjective, reserve, extra, replacement)
1
proxy(extra, auxiliary)
1
stopgap(extra, auxiliary)
1
supplement(addition, adjunct)
1
supporting actor(expression, idiom, extra, the drama)
1
surrogate(extra, auxiliary)
0
accession
0
accretion
0
add-on(addition, supplement)
0
appendage(addition, supplement)
0
appurtenance(addition, supplement)
0
attachment(addition, supplement)
0
backing
0
bonus(addition, supplement)
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APASmart Define. (2015). supernumerary thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/supernumerary/thesaurus/synonyms
ChicagoSmart Define. 2015. "supernumerary thesaurus" https://smartdefine.org/supernumerary/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, supernumerary thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/supernumerary/thesaurus/synonyms>.
MLASmart Define. "supernumerary thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/supernumerary/thesaurus/synonyms>