shakedown vs patois

shakedown and patois both are nouns.

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

shakedown (noun)	patois (noun)
extortion of money (as by blackmail)	a regional dialect of a language (especially French); usually considered substandard
a very thorough search of a person or a place	a characteristic language of a particular group (as among thieves)
initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state

shakedown (adjective)	patois (adjective)
intended to test a new system under operating conditions and to familiarize the operators with the system