Synonyms|74Antonyms|50|Broader|13Narrower|27Related|335
1
retrograde(adjective, past, underdevelopment)
1
retrogressive(adjective, past, underdevelopment)
1
superseded(adjective, past, regress)
1
underdeveloped(adjective, past, underdevelopment)
1
undeveloped(adjective, past, underdevelopment)
1
unfashionable(adjective, past, regress)
1
unpopular(adjective, past, regress)
1
unprogressive(adjective, past, underdevelopment)
1
unsophisticated(adjective, past, underdevelopment)
1
unstylish(adjective, past, regress)
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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>