- Definitions|0
- Thesaurus|499
- Abbreviations|0
36 entries under adjective topic. ×
| crusty(past, regress) | |
| downhill(past, underdevelopment) | |
| old-fangled(past, regress) | |
| prehistoric(past, regress) | |
| primitive(past, underdevelopment) | |
| regressive(past, underdevelopment) | |
| retrograde(past, underdevelopment) | |
| retrogressive(past, underdevelopment) | |
| superseded(past, regress) | |
| underdeveloped(past, underdevelopment) | |
| undeveloped(past, underdevelopment) | |
| unfashionable(past, regress) | |
| unpopular(past, regress) | |
| unprogressive(past, underdevelopment) | |
| unsophisticated(past, underdevelopment) | |
| unstylish(past, regress) |
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| APA | Smart Define. (1970). future-proof thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/future-proof/thesaurus/antonyms |
| Chicago | Smart Define. 1970. "future-proof thesaurus" https://smartdefine.org/future-proof/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 1970, future-proof thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/future-proof/thesaurus/antonyms>. |
| MLA | Smart Define. "future-proof thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/future-proof/thesaurus/antonyms> |