Archean aeon vs Archean eon

Archean aeon and Archean eon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Archean aeon	Yes	No	No	No
Archean eon	Yes	No	No	No

As nouns, Archean aeon and Archean eon are synonyms defined as:

Archean aeon and Archean eon: the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life

Other synonyms of Archean aeon include Archaeozoic, Archaeozoic aeon, Archean, Archeozoic, Archeozoic eon.

Archean aeon (noun)	Archean eon (noun)
the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life	the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life