graduation vs closing

graduation and closing both are nouns.

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

As nouns, closing is a hypernym of graduation; that is, closing is a word with a broader meaning than graduation:

Other hypernyms of graduation include completion, culmination, mop up, windup.

graduation (noun)	closing (noun)
the act of arranging in grades	termination of operations
the successful completion of a program of study	the act of closing something
a line (as on a vessel or ruler) that marks a measurement	a concluding action
an academic exercise in which diplomas are conferred	approaching a particular destination; a coming closer; a narrowing of a gap
	the last section of a communication

graduation (adjective)	closing (adjective)
	final or ending