jargon vs patois

jargon and patois both are nouns.

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

As nouns, jargon and patois are synonyms defined as:

jargon and patois: a characteristic language of a particular group (as among thieves)

Other synonyms of jargon include argot, cant, lingo, slang, vernacular.

jargon (noun)	patois (noun)
a characteristic language of a particular group (as among thieves)	a regional dialect of a language (especially French); usually considered substandard
specialized technical terminology characteristic of a particular subject	a characteristic language of a particular group (as among thieves)
a colorless (or pale yellow or smoky) variety of zircon