50 entries under adjective topic. ×

2
additional(spare, reserve, extra, replacement)
2
extra(noun, increase, new, reserve)
2
optional
2
spare(new, reserve, extra, replacement)
2
surplus(reserve, extra, replacement, added)
1
odd(reserve, extra, replacement, unused)
1
supplementary(new, extra, added)
0
auxiliary(extra, replacement, standby)
0
backup(reserve, extra, replacement, unused)
0
bare
0
bonus(noun, extra, supplement, added)
0
de trop(expression, reserve, extra, replacement)
0
dispensable
0
economical
0
emergency(reserve, extra, replacement, unused)
0
extraordinary
0
free(reserve, extra, replacement, unused)
0
frugal
0
gaunt
0
in excess(expression, spare, reserve, extra)
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APASmart Define. (2016). option thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/option/thesaurus/synonyms
ChicagoSmart Define. 2016. "option thesaurus" https://smartdefine.org/option/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, option thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/option/thesaurus/synonyms>.
MLASmart Define. "option thesaurus" 9 March 2016. Web. 22 September 2026. <https://smartdefine.org/option/thesaurus/synonyms>