dispatch vs bump off

dispatch is a noun but bump off is not a noun.

Word	Noun	Adjective	Verb	Adverb
dispatch	Yes	No	Yes	No
bump off	No	No	Yes	No

As verbs, dispatch and bump off are synonyms defined as:

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

dispatch (noun)	bump off (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)	bump off (verb)
kill without delay	kill intentionally and with premeditation
send away towards a designated goal
complete or carry out
kill intentionally and with premeditation
dispose of rapidly and without delay and efficiently