quotation vs excerption

quotation and excerption both are nouns.

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

As nouns, excerption is a hypernym of quotation; that is, excerption is a word with a broader meaning than quotation:

Other hypernyms of quotation include excerpt, extract, selection.

quotation (noun)	excerption (noun)
the practice of quoting from books or plays etc.	The act of excerpting or selecting from a larger work.
a passage or expression that is quoted or cited	a passage selected from a larger work
a short note recognizing a source of information or of a quoted passage
a statement of the current market price of a security or commodity