Archean aeon vs Archean

Archean aeon and Archean both are nouns.

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

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

Archean aeon and Archean: 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 eon, Archeozoic, Archeozoic eon.

Archean aeon (noun)	Archean (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