excerption vs selection

excerption and selection both are nouns.

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

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

Other hypernyms of excerption include choice, option, pick.

As nouns, excerption and selection are synonyms defined as:

Other synonyms of excerption include excerpt, extract.

excerption (noun)	selection (noun)
The act of excerpting or selecting from a larger work.	the act of choosing or selecting
a passage selected from a larger work	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