dispatch vs slay

dispatch is a noun but slay is not a noun.

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

As verbs, dispatch and slay are synonyms defined as:

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

dispatch (noun)	slay (noun)
the act of sending off something
killing a person or animal
the property of being prompt and efficient
an official report (usually sent in haste)

dispatch (verb)	slay (verb)
kill without delay	kill intentionally and with premeditation
send away towards a designated goal	to succeed greatly
complete or carry out
kill intentionally and with premeditation
dispose of rapidly and without delay and efficiently