121 entries under adjective topic. ×

9
out(informal, odd, old, primitive)
9
unfashionable(bad, cool, last, original)
9
bygone(last, original, dead, odd)
9
expired(feature, characteristic, trait, the past)
8
out of fashion(expression, idiom, bad, cool)
8
old-time(last, original, odd, old)
7
stale(last, original, tired, other)
7
superseded(new, unfashionable, antiquated, archaic)
7
unused
6
defunct(tired, lost, functioning, invalid)
6
demoded(bad, cool, odd, old)
6
musty(odd, old, primitive, unfashionable)
6
outworn(odd, old, primitive, unfashionable)
6
past(last, original, dead, odd)
6
unstylish(bad, cool, odd, old)
5
behind the times(expression, idiom, odd, current)
5
discarded(rejected, vogue)
5
gone(vogue, the past)
5
hackneyed(last, original, tired, stale)
4
abandoned
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APASmart Define. (2016). obsolete thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/obsolete/thesaurus/synonyms
ChicagoSmart Define. 2016. "obsolete thesaurus" https://smartdefine.org/obsolete/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, obsolete thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/obsolete/thesaurus/synonyms>.
MLASmart Define. "obsolete thesaurus" 28 March 2016. Web. 24 September 2026. <https://smartdefine.org/obsolete/thesaurus/synonyms>