Hadean vs eon

Hadean and eon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hadean	Yes	Yes	No	No
eon	Yes	No	No	No

Hadean (noun)	eon (noun)
the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life	(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe
	an immeasurably long period of time
	the longest division of geological time

Hadean (adjective)	eon (adjective)
of or relating to or characteristic of Hades or Tartarus