Synonyms|396Antonyms|89|Broader|6Narrower|5Related|200

50 entries under obsolete topic. ×

12
erstwhile(adjective, adverb, time, last, original)
12
sometime(expression, adjective, adverb, time, moment)
10
late(adjective, adverb, last, original, dead)
9
former(noun, adjective, adverb, order, time)
9
quondam(adjective, adverb, last, original, late)
8
old(adjective, adverb, last, late, past)
6
onetime(adjective, last, original, past, primitive)
6
past(adjective, original, old, previous)
5
bygone(adjective, adverb, last, original, late)
3
early(adjective, last, original, late, old)
3
olden(adjective, original, late, old, past)
2
immemorial(last, original, past, primitive, venerable)
2
of old(expression, adjective, adverb, last, original)
2
of yore(expression, adjective, adverb, last, original)
2
primeval(last, original, past, primitive, venerable)
2
primitive(last, original, old, past, venerable)
1
aboriginal(last, original, past, primitive, venerable)
1
age-old(last, original, past, primitive, venerable)
1
antediluvian(last, original, past, primitive, venerable)
1
antiquated(adjective, last, original, past, venerable)
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APASmart Define. (2016). once thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/once/thesaurus/synonyms
ChicagoSmart Define. 2016. "once thesaurus" https://smartdefine.org/once/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, once thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/once/thesaurus/synonyms>.
MLASmart Define. "once thesaurus" 30 March 2016. Web. 20 September 2026. <https://smartdefine.org/once/thesaurus/synonyms>