Antediluvian
Antediluvian adjective - Dating or surviving from the distant past.
Usage example: found evidence in the Middle East of an antediluvian people previously unknown to history
Timeless and antediluvian are semantically related. In some cases you can use "Timeless" instead an adjective "Antediluvian".
Timeless
Timeless adjective - Having an existence or validity that does not change or diminish.
Antediluvian and timeless are semantically related. Sometimes you can use "Antediluvian" instead an adjective "Timeless".
Mutual synonyms
Cite this Source
Timeless and Antediluvian. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/antediluvian/timeless
Antediluvian & Timeless. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/antediluvian/timeless>.
Timeless or Antediluvian. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/antediluvian/timeless.
Google Ngram Viewer shows how "antediluvian" and "timeless" have occurred on timeline