Synonyms|527Antonyms|111|Broader|20Narrower|54Related|356

97 entries under extra topic. ×

1
reserve(adjective, support, extraordinary, new, spare)
1
special(adjective, extraordinary, new, spare, fresh)
1
subsidary(adjective, subject, collateral, attendant)
1
superfluous(adjective, extraordinary, new, spare, fresh)
1
surrogate(noun, auxiliary, supernumerary)
1
tip(adjective, extraordinary, new, spare, fresh)
1
unnecessary(adjective, extraordinary, new, spare, fresh)
1
unneeded(adjective, extraordinary, new, spare, fresh)
1
unused(adjective, extraordinary, new, spare, fresh)
0
acting(auxiliary, supernumerary)
0
add-on(noun, adjective, addition, additional)
0
alternative(additional, auxiliary, another, supernumerary)
0
artificial(auxiliary, supernumerary)
0
counterfeit(auxiliary, supernumerary)
0
derivative(inferior, minor, subordinate, additional)
0
dummy(auxiliary, supernumerary)
0
ersatz(auxiliary, supernumerary)
0
experimental(auxiliary, supernumerary)
0
false(auxiliary, supernumerary)
0
imitation(auxiliary, supernumerary)
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ChicagoSmart Define. 2015. "ancillary thesaurus" https://smartdefine.org/ancillary/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, ancillary thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ancillary/thesaurus/synonyms>.
MLASmart Define. "ancillary thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/ancillary/thesaurus/synonyms>