- Definitions|0
- Thesaurus|48
- Abbreviations|0
| date | |
| obsolesce(verb, obsolete) | |
| age | |
| deteriorate(verb, decline, fall, terminate, degenerate) | |
| die(verb, decline, fall, terminate, degenerate) | |
| fade | |
| fossilize | |
| fust | |
| grow old | |
| lapse(verb, decline, fall, void, tumble) | |
| molder | |
| perish | |
| recede(verb, decline, fall, terminate, degenerate) | |
| recidivate(verb, decline, fall, terminate, degenerate) | |
| retrograde(verb, decline, fall, terminate, degenerate) | |
| revert(verb, decline, fall, terminate, degenerate) | |
| rust | |
| superannuate | |
| antiquate(verb, obsolete) | |
| apostatize(verb, decline, fall, terminate, degenerate) |
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| APA | Smart Define. (2015). become obsolete thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/become_obsolete/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "become obsolete thesaurus" https://smartdefine.org/become_obsolete/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, become obsolete thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/become_obsolete/thesaurus/synonyms>. |
| MLA | Smart Define. "become obsolete thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/become_obsolete/thesaurus/synonyms> |