play hooky vs patois

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

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

play hooky (noun)	patois (noun)
	a regional dialect of a language (especially French); usually considered substandard
	a characteristic language of a particular group (as among thieves)

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