eon vs geological time

eon and geological time both are nouns.

Word	Noun	Adjective	Verb	Adverb
eon	Yes	No	No	No
geological time	Yes	No	No	No

As nouns, geological time is a hypernym of eon; that is, geological time is a word with a broader meaning than eon:

eon: the longest division of geological time
geological time: the time of the physical formation and development of the earth (especially prior to human history)

Other hypernyms of eon include geologic time.

eon (noun)	geological time (noun)
(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe	the time of the physical formation and development of the earth (especially prior to human history)
an immeasurably long period of time
the longest division of geological time