Athena vs Athene

Athena and Athene both are nouns.

Word	Noun	Adjective	Verb	Adverb
Athena	Yes	No	No	No
Athene	Yes	No	No	No

As nouns, Athena and Athene are synonyms defined as:

Athena and Athene: (Greek mythology) goddess of wisdom and useful arts and prudent warfare; guardian of Athens; identified with Roman Minerva

Other synonyms of Athena include Pallas, Pallas Athena, Pallas Athene.

Athena (noun)	Athene (noun)
(Greek mythology) goddess of wisdom and useful arts and prudent warfare; guardian of Athens; identified with Roman Minerva	a genus of Strigidae containing the spotted owlet, little owl, forest owlet, and burrowing owl (Athene)
	(Greek mythology) goddess of wisdom and useful arts and prudent warfare; guardian of Athens; identified with Roman Minerva