sawn-off vs patois

sawn-off is not a noun while patois is a noun.

Word	Noun	Adjective	Verb	Adverb
sawn-off	No	Yes	No	No
patois	Yes	No	No	No

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

sawn-off (adjective)	patois (adjective)
shortened
well below average height