purchase vs select

purchase is a noun but select is not a noun.

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

purchase (noun)	select (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

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

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