point of apoapsis vs apoapsis

point of apoapsis and apoapsis both are nouns.

Word	Noun	Adjective	Verb	Adverb
point of apoapsis	Yes	No	No	No
apoapsis	Yes	No	No	No

As nouns, point of apoapsis and apoapsis are synonyms defined as:

point of apoapsis and apoapsis: (astronomy) the point in an orbit farthest from the body being orbited

point of apoapsis (noun)	apoapsis (noun)
(astronomy) the point in an orbit farthest from the body being orbited	(astronomy) the point in an orbit farthest from the body being orbited