13
vintage
11
past(adjective, old, former, preceding, done)
7
old-fashioned(adjective, old, up-to-date, antiquated)
6
antiquated(adjective, old, modern)
5
old(adjective, traditional, outdated, obsolete)
5
ancient
5
former(adjective, order, time)
5
traditional
4
antique
4
antediluvian
4
noncurrent
4
obsolete(adjective, vogue)
4
old-time
4
boring
4
legacy(feature, characteristic, state, computing)
3
dated(verb, adjective, new)
3
erstwhile
3
outdated
3
aforementioned
3
dead
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APASmart Define. (2015). current thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/current/thesaurus/antonyms
ChicagoSmart Define. 2015. "current thesaurus" https://smartdefine.org/current/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, current thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/current/thesaurus/antonyms>.
MLASmart Define. "current thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/current/thesaurus/antonyms>