play hooky vs jargon

play hooky is not a noun while jargon is a noun.

Word	Noun	Adjective	Verb	Adverb
play hooky	No	No	Yes	No
jargon	Yes	No	No	No

play hooky (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

play hooky (verb)	jargon (verb)
play truant from work or school