dispatch vs send off

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

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

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

Other synonyms of dispatch include despatch.

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