Synonyms|74Antonyms|50|Broader|13Narrower|27Related|335
2
superannuated(adjective, feature, state, characteristic, disuse)
1
antediluvian(adjective, past, regress)
1
antiquated(adjective, past, regress)
1
backward(adjective, past, underdevelopment)
1
behind the times(expression, past, regress)
1
benighted(adjective, past, underdevelopment)
1
bygone(adjective, past, regress)
1
crusty(adjective, past, regress)
1
downhill(adjective, past, underdevelopment)
1
for the worse(expression, past, underdevelopment)
1
in the wrong direction(expression, past, underdevelopment)
1
last year's(expression, past, regress)
1
old-fangled(adjective, past, regress)
1
olde worlde(expression, past, regress)
1
out of date(expression, past, regress)
1
out of fashion(expression, past, regress)
1
out of style(expression, past, regress)
1
prehistoric(adjective, past, regress)
1
primitive(adjective, past, underdevelopment)
1
regressive(adjective, past, underdevelopment)
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APASmart Define. (1970). future-proof thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/future-proof/thesaurus/antonyms
ChicagoSmart Define. 1970. "future-proof thesaurus" https://smartdefine.org/future-proof/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 1970, future-proof thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/future-proof/thesaurus/antonyms>.
MLASmart Define. "future-proof thesaurus" 1 January 1970. Web. 21 September 2026. <https://smartdefine.org/future-proof/thesaurus/antonyms>