parricide vs manslayer

parricide and manslayer both are nouns.

Word	Noun	Adjective	Verb	Adverb
parricide	Yes	No	No	No
manslayer	Yes	No	No	No

As nouns, manslayer is a hypernym of parricide; that is, manslayer is a word with a broader meaning than parricide:

parricide: someone who kills his or her parent
manslayer: a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)

Other hypernyms of parricide include liquidator, murderer.

parricide (noun)	manslayer (noun)
the murder of your own father or mother	a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)
someone who kills his or her parent