finalisation vs culmination

finalisation and culmination both are nouns.

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

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

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

finalisation (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