slang vs shakedown

slang and shakedown both are nouns.

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

slang (noun)	shakedown (noun)
a characteristic language of a particular group (as among thieves)	extortion of money (as by blackmail)
informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar	a very thorough search of a person or a place
	initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state

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