aposelene vs apoapsis

aposelene and apoapsis both are nouns.

Word	Noun	Adjective	Verb	Adverb
aposelene	Yes	No	No	No
apoapsis	Yes	No	No	No

As nouns, apoapsis is a hypernym of aposelene; that is, apoapsis is a word with a broader meaning than aposelene:

aposelene: apoapsis in orbit around the moon
apoapsis: (astronomy) the point in an orbit farthest from the body being orbited

Other hypernyms of aposelene include point of apoapsis.

aposelene (noun)	apoapsis (noun)
apoapsis in orbit around the moon	(astronomy) the point in an orbit farthest from the body being orbited