excerpt vs selection

excerpt and selection both are nouns.

Word	Noun	Adjective	Verb	Adverb
excerpt	Yes	No	Yes	No
selection	Yes	No	No	No

As nouns, excerpt and selection are synonyms defined as:

Other synonyms of excerpt include excerption, extract.

excerpt (noun)	selection (noun)
a passage selected from a larger work	the act of choosing or selecting
	the person or thing chosen or selected
	a passage selected from a larger work
	an assortment of things from which a choice can be made
	a natural process resulting in the evolution of organisms best adapted to the environment

excerpt (verb)	selection (verb)
take out of a literary work in order to cite or copy