parricide vs murderer

parricide and murderer both are nouns.

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

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

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

Other hypernyms of parricide include liquidator, manslayer.

parricide (noun)	murderer (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