underworld vs racketeer

underworld and racketeer both are nouns.

Word	Noun	Adjective	Verb	Adverb
underworld	Yes	No	No	No
racketeer	Yes	No	Yes	No

underworld (noun)	racketeer (noun)
(religion) the world of the dead	someone who commits crimes for profit (especially one who obtains money by fraud or extortion)
the criminal class

underworld (verb)	racketeer (verb)
	carry on illegal business activities involving crime