slay vs murder

slay is not a noun while murder is a noun.

Word	Noun	Adjective	Verb	Adverb
slay	No	No	Yes	No
murder	Yes	No	Yes	No

As verbs, slay and murder are synonyms defined as:

Other synonyms of slay include bump off, dispatch, hit, off, polish off, remove.

slay (noun)	murder (noun)
	unlawful premeditated killing of a human being by a human being

slay (verb)	murder (verb)
kill intentionally and with premeditation	alter so as to make unrecognizable
to succeed greatly	kill intentionally and with premeditation