8
out of date(expression, adjective, idiom)
7
obsolescent(adjective, odd, old, primitive, unfashionable)
7
outworn(adjective, odd, old, primitive, unfashionable)
6
behind the times(expression, adjective, idiom, odd, current)
6
expired(adjective, feature, characteristic, trait)
6
old-hat(adjective, common, tired, odd, old)
5
antediluvian(adjective, original, old, venerable, outdated)
5
bygone(adjective, new, last, original, odd)
5
disused
5
ex
5
fusty(adjective, new)
5
legacy(feature, characteristic, state, computing)
5
out of fashion(expression, adjective, idiom)
5
passee
5
tacky(adjective, plain, cheap, tasteless, shabby)
4
defunct(out-of-date, nonexistent, vanished, inexistent)
4
old-time(adjective, dull, new, last, original)
4
old fashioned(expression, adjective, idiom)
4
oldfangled(adjective, last, original, odd, old)
4
unstylish(adjective, plain, vulgar, odd, tasteless)
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APASmart Define. (2016). outmoded thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/outmoded/thesaurus/synonyms
ChicagoSmart Define. 2016. "outmoded thesaurus" https://smartdefine.org/outmoded/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, outmoded thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/outmoded/thesaurus/synonyms>.
MLASmart Define. "outmoded thesaurus" 12 February 2016. Web. 22 September 2026. <https://smartdefine.org/outmoded/thesaurus/synonyms>