desperado vs felon

desperado and felon both are nouns.

Word	Noun	Adjective	Verb	Adverb
desperado	Yes	No	No	No
felon	Yes	No	No	No

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

desperado: a bold outlaw (especially on the American frontier)
felon: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of desperado include criminal, crook, malefactor, outlaw.

desperado (noun)	felon (noun)
a bold outlaw (especially on the American frontier)	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