jailbird vs malefactor

jailbird and malefactor both are nouns.

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

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

jailbird: 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 jailbird include criminal, crook, felon, outlaw.

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