infanticide vs slaying

infanticide and slaying both are nouns.

Word	Noun	Adjective	Verb	Adverb
infanticide	Yes	No	No	No
slaying	Yes	No	No	No

As nouns, slaying is a hypernym of infanticide; that is, slaying is a word with a broader meaning than infanticide:

Other hypernyms of infanticide include execution, murder.

infanticide (noun)	slaying (noun)
murdering an infant	unlawful premeditated killing of a human being by a human being
a person who murders an infant