shutdown vs closing

shutdown and closing both are nouns.

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

As nouns, shutdown and closing are synonyms defined as:

Other synonyms of shutdown include closedown, closure.

shutdown (noun)	closing (noun)
termination of operations	termination of operations
	the act of closing something
	a concluding action
	approaching a particular destination; a coming closer; a narrowing of a gap
	the last section of a communication

shutdown (adjective)	closing (adjective)
	final or ending