36 entries under extra topic. ×

15
tentative(adjective, new, inferior, sensitive, limited)
7
experimental(adjective, new, near, unsettled)
3
alternative(crude, substitute, temporary, auxiliary)
3
backup(auxiliary, supernumerary)
3
reserve(auxiliary, supernumerary)
2
counterfeit(auxiliary, supernumerary)
2
dummy(auxiliary, supernumerary)
2
ersatz(crude, auxiliary, supernumerary, rough-and-ready)
2
imitation(auxiliary, supernumerary)
2
mock(auxiliary, supernumerary)
2
near(preposition, reasonable, like, fair)
2
proxy(auxiliary, supernumerary)
2
vicarious(auxiliary, supernumerary)
1
auxiliary
0
additional(auxiliary, supernumerary)
0
ancillary(auxiliary, supernumerary)
0
another(auxiliary, supernumerary)
0
artificial(auxiliary, supernumerary)
0
false(auxiliary, supernumerary)
0
other(auxiliary, supernumerary)
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APASmart Define. (2016). provisional thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/provisional/thesaurus/synonyms
ChicagoSmart Define. 2016. "provisional thesaurus" https://smartdefine.org/provisional/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, provisional thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/provisional/thesaurus/synonyms>.
MLASmart Define. "provisional thesaurus" 26 February 2016. Web. 22 September 2026. <https://smartdefine.org/provisional/thesaurus/synonyms>