pick out vs purchase

pick out is not a noun while purchase is a noun.

Word	Noun	Adjective	Verb	Adverb
pick out	No	No	Yes	No
purchase	Yes	No	Yes	No

pick out (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

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