57 entries under obsolete topic. ×

20
former(noun, adjective, order, time, last)
20
past(verb, adjective, phrasal verb, last, original)
14
old(adjective, new, last, dead, odd)
11
archaic(adjective, plain, new, last, original)
11
antique(noun, adjective, value, new, last)
11
dead(adjective, odd, out, old, past)
11
extinct(adjective, dead, odd, out, old)
11
olden(adjective, original, odd, late, old)
10
antiquated(adjective, plain, new, last, original)
10
erstwhile(adjective, last, original, late, old)
10
late(adjective, last, original, dead, old)
9
old-time(adjective, new, last, original, odd)
8
defunct(adjective, tired, past, lost)
8
passé(noun, adjective, plain, new, last)
8
quondam(noun, adjective, last, original, late)
7
dated(adjective, plain, new, last, original)
6
of old(expression, adjective, idiom, last, original)
6
out-of-date(adjective, new, last, original, dead)
6
over(adjective, late, old, past, finished)
6
venerable(original, old, primitive, outdated)
<123>
11 years ago|11k views|share |citing 
APASmart Define. (2015). bygone thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/bygone/thesaurus/synonyms
ChicagoSmart Define. 2015. "bygone thesaurus" https://smartdefine.org/bygone/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, bygone thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/bygone/thesaurus/synonyms>.
MLASmart Define. "bygone thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/bygone/thesaurus/synonyms>