grotty vs patois

grotty is not a noun while patois is a noun.

Word	Noun	Adjective	Verb	Adverb
grotty	No	Yes	No	No
patois	Yes	No	No	No

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

grotty (adjective)	patois (adjective)
very unpleasant or offensive