strong-armer vs felon

strong-armer and felon both are nouns.

Word	Noun	Adjective	Verb	Adverb
strong-armer	Yes	No	No	No
felon	Yes	No	No	No

As nouns, felon is a hypernym of strong-armer; that is, felon is a word with a broader meaning than strong-armer:

strong-armer: an aggressive and violent young criminal
felon: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of strong-armer include criminal, crook, malefactor, outlaw.

strong-armer (noun)	felon (noun)
an aggressive and violent young criminal	someone who has committed a crime or has been legally convicted of a crime
	a purulent infection at the end of a finger or toe in the area surrounding the nail