Aeonian
Aeonian adjective - Of or relating to a geological eon (longer than an era).
Mutual synonyms
Cite this Source
Old and Aeonian. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/aeonian/old
Aeonian & Old. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/aeonian/old>.
Old or Aeonian. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/aeonian/old.
Google Ngram Viewer shows how "aeonian" and "old" have occurred on timeline