apogee vs culmination

apogee and culmination both are nouns.

Word	Noun	Adjective	Verb	Adverb
apogee	Yes	No	No	No
culmination	Yes	No	No	No

As nouns, apogee and culmination are synonyms defined as:

apogee (noun)	culmination (noun)
apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth	a concluding action
a final climactic stage	the decisive moment in a novel or play
	(astronomy) a heavenly body's highest celestial point above an observer's horizon
	a final climactic stage