slaughter vs slaying

slaughter and slaying both are nouns.

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

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

Other hypernyms of slaughter include execution, murder.

slaughter (noun)	slaying (noun)
the killing of animals (as for food)	unlawful premeditated killing of a human being by a human being
the savage and excessive killing of many people
a sound defeat

slaughter (verb)	slaying (verb)
kill a large number of people indiscriminately
kill (animals) usually for food consumption