Bygone and Extinct

Bygone

Bygone adjective - No longer existing.
Usage example: elderly people reminiscing about bygone fashions

Extinct is a synonym for bygone in past topic. In some cases you can use "Extinct" instead an adjective "Bygone", when it comes to topics like vanished, in the past. popular alternative

Extinct

Extinct adjective - No longer existing.
Usage example: a few overgrown ruins are all that remain of that once mighty but now extinct civilization

Bygone is a synonym for extinct in dead topic. You can use "Bygone" instead an adjective "Extinct", if it concerns topics such as vanished. popular alternative

Nearby Word: extinction
Cite this Source
Extinct and Bygone. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/bygone/extinct
Bygone & Extinct. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/bygone/extinct>.
Extinct or Bygone. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/bygone/extinct.
Google Ngram Viewer shows how "bygone" and "extinct" have occurred on timeline