finalization vs culmination

finalization and culmination both are nouns.

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

As nouns, culmination is a hypernym of finalization; that is, culmination is a word with a broader meaning than finalization:

Other hypernyms of finalization include closing, completion, mop up, windup.

finalization (noun)	culmination (noun)
the act of finalizing	a concluding action
	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