lynching vs slaying

lynching and slaying both are nouns.

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

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

lynching: putting a person to death by mob action without due process of law
slaying: unlawful premeditated killing of a human being by a human being

Other hypernyms of lynching include execution, murder.

lynching (noun)	slaying (noun)
putting a person to death by mob action without due process of law	unlawful premeditated killing of a human being by a human being