closing vs culmination

closing and culmination both are nouns.

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

As nouns, closing and culmination are synonyms defined as:

Other synonyms of closing include completion, mop up, windup.

closing (noun)	culmination (noun)
termination of operations	a concluding action
the act of closing something	the decisive moment in a novel or play
a concluding action	(astronomy) a heavenly body's highest celestial point above an observer's horizon
approaching a particular destination; a coming closer; a narrowing of a gap	a final climactic stage
the last section of a communication

closing (adjective)	culmination (adjective)
final or ending