firebug vs felon

firebug and felon both are nouns.

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

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

firebug: a criminal who illegally sets fire to property
felon: someone who has committed a crime or has been legally convicted of a crime

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

firebug (noun)	felon (noun)
a true bug: brightly colored bug that can exude a stain	someone who has committed a crime or has been legally convicted of a crime
a criminal who illegally sets fire to property	a purulent infection at the end of a finger or toe in the area surrounding the nail