9
out(adjective, informal, odd, old, primitive)
9
unfashionable(adjective, bad, cool, last, original)
9
bygone(adjective, last, original, dead, odd)
9
expired(adjective, feature, characteristic, trait, the past)
8
out of fashion(expression, adjective, idiom, bad, cool)
8
old-time(adjective, last, original, odd, old)
7
stale(adjective, last, original, tired, other)
7
superseded(adjective, new, unfashionable, antiquated, archaic)
7
unused(adjective, disused)
6
defunct(adjective, tired, lost, functioning, invalid)
6
demoded(adjective, bad, cool, odd, old)
6
musty(adjective, odd, old, primitive, unfashionable)
6
outworn(adjective, odd, old, primitive, unfashionable)
6
past(adjective, last, original, dead, odd)
6
unstylish(adjective, bad, cool, odd, old)
5
behind the times(expression, adjective, idiom, odd, current)
5
discarded(adjective, rejected, vogue)
5
gone(adjective, vogue, the past)
5
hackneyed(adjective, last, original, tired, stale)
4
abandoned(adjective, disused)
10 years ago|18k views|share |citing 
APASmart Define. (2016). obsolete thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/obsolete/thesaurus/synonyms
ChicagoSmart Define. 2016. "obsolete thesaurus" https://smartdefine.org/obsolete/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, obsolete thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/obsolete/thesaurus/synonyms>.
MLASmart Define. "obsolete thesaurus" 28 March 2016. Web. 22 September 2026. <https://smartdefine.org/obsolete/thesaurus/synonyms>