| Word | Definitions | Synonyms |
|---|---|---|
| obsolesce | (verb) become obsolete, fall into disuse | - |
| obsolescence | (noun) the process of becoming obsolete; falling into disuse or becoming out of date | - |
| obsolescent | (adjective) becoming obsolete | - |
| obsolete | (adjective) no longer in use | Synonyms: disused |
| (adjective) old; no longer valid or fashionable | Synonyms: out-of-date, outdated, superannuated | |
| obsoleteness | (noun) the property of being out of date and not current | Synonyms: superannuation |