culmination vs apogee

culmination and apogee both are nouns.

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

As nouns, culmination and apogee are synonyms defined as:

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