briber vs malefactor

briber and malefactor both are nouns.

Word	Noun	Adjective	Verb	Adverb
briber	Yes	No	No	No
malefactor	Yes	No	No	No

As nouns, malefactor is a hypernym of briber; that is, malefactor is a word with a broader meaning than briber:

briber: someone who pays (or otherwise incites) you to commit a wrongful act
malefactor: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of briber include criminal, crook, felon, outlaw.

briber (noun)	malefactor (noun)
someone who pays (or otherwise incites) you to commit a wrongful act	someone who has committed a crime or has been legally convicted of a crime