buy it vs jargon

buy it is not a noun while jargon is a noun.

Word	Noun	Adjective	Verb	Adverb
buy it	No	No	Yes	No
jargon	Yes	No	No	No

buy it (noun)	jargon (noun)
	a characteristic language of a particular group (as among thieves)
	specialized technical terminology characteristic of a particular subject
	a colorless (or pale yellow or smoky) variety of zircon

buy it (verb)	jargon (verb)
be killed or die