Synonyms|189Antonyms|61|Broader|3Narrower|0Related|245
2
once upon a time(expression, idiom, adverb, late, earlier)
2
other(adjective, head, last, previous, earlier)
2
primeval(last, original, past, primitive, venerable)
2
primitive(last, original, old, past, venerable)
2
radically(adverb, earlier, then, before, once)
2
some time ago(expression, idiom, adverb, late, earlier)
2
time was(expression, adverb, late, old, past)
2
used to be(expression, idiom, adverb, earlier, then)
2
water under the bridge(expression, idiom, dead, past, lost)
1
aboriginal(last, original, past, primitive, venerable)
1
above
1
above-mentioned
1
above-named
1
aforeknown
1
aforesaid
1
age-old(last, original, past, primitive, venerable)
1
ages ago(expression, adjective, late, old, past)
1
ahead of
1
ancient history(expression, adjective, late, old, past)
1
antediluvian(last, original, past, primitive, venerable)
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APASmart Define. (2015). erstwhile thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/erstwhile/thesaurus/synonyms
ChicagoSmart Define. 2015. "erstwhile thesaurus" https://smartdefine.org/erstwhile/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, erstwhile thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/erstwhile/thesaurus/synonyms>.
MLASmart Define. "erstwhile thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/erstwhile/thesaurus/synonyms>