Antediluvian and Ongoing

Antediluvian

Antediluvian adjective - Dating or surviving from the distant past.

Ongoing is an antonym for antediluvian.

Ongoing

Ongoing adjective - Existing or in progress right now.
Usage example: the ongoing presidential campaign

Antediluvian is an antonym for ongoing.
Cite this Source
Ongoing and Antediluvian. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/antediluvian/ongoing
Antediluvian & Ongoing. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/antediluvian/ongoing>.
Ongoing or Antediluvian. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/antediluvian/ongoing.
Google Ngram Viewer shows how "antediluvian" and "ongoing" have occurred on timeline