select vs purchase

select is not a noun while purchase is a noun.

Word	Noun	Adjective	Verb	Adverb
select	No	Yes	Yes	No
purchase	Yes	No	Yes	No

select (noun)	purchase (noun)
	the acquisition of something for payment
	the mechanical advantage gained by being in a position to use a lever
	a means of exerting influence or gaining advantage
	something acquired by purchase

select (adjective)	purchase (adjective)
selected or chosen for special qualifications
of superior grade

select (verb)	purchase (verb)
pick out, select, or choose from a number of alternatives	obtain by purchase; acquire by means of a financial transaction