jail bird vs malefactor

jail bird and malefactor both are nouns.

Word	Noun	Adjective	Verb	Adverb
jail bird	Yes	No	No	No
malefactor	Yes	No	No	No

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

jail bird: a criminal who has been jailed repeatedly
malefactor: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of jail bird include criminal, crook, felon, outlaw.

jail bird (noun)	malefactor (noun)
a criminal who has been jailed repeatedly	someone who has committed a crime or has been legally convicted of a crime