street name vs patois

street name and patois both are nouns.

Word	Noun	Adjective	Verb	Adverb
street name	Yes	No	No	No
patois	Yes	No	No	No

As nouns, patois is a hypernym of street name; that is, patois is a word with a broader meaning than street name:

Other hypernyms of street name include name, argot, cant, jargon, lingo, slang, vernacular.

street name (noun)	patois (noun)
the name of a street	a regional dialect of a language (especially French); usually considered substandard
the name of a brokerage firm in which stock is held on behalf of a customer	a characteristic language of a particular group (as among thieves)
slang for something (especially for an illegal drug)
an alternative name that a person chooses or is given (especially in inner city neighborhoods)