excerption vs citation

excerption and citation both are nouns.

Word	Noun	Adjective	Verb	Adverb
excerption	Yes	No	No	No
citation	Yes	No	No	No

As nouns, citation is a hyponym of excerption; that is, citation is a word with a more specific, narrower meaning than excerption:

excerption (noun)	citation (noun)
The act of excerpting or selecting from a larger work.	an official award (as for bravery or service) usually given as formal public statement
a passage selected from a larger work	a short note recognizing a source of information or of a quoted passage
	a summons that commands the appearance of a party at a proceeding
	a passage or expression that is quoted or cited
	(law) the act of citing (as of spoken words or written passages or legal precedents etc.)