send back vs send

send back and send both are verbs.

Word	Noun	Adjective	Verb	Adverb
send back	No	No	Yes	No
send	No	No	Yes	No

send back (verb)	send (verb)
refer (a matter or legal case) to another committee or authority or court for decision	cause to be directed or transmitted to another place
	transfer
	broadcast over the airwaves, as in radio or television
	assign to a station
	to cause or order to be taken, directed, or transmitted to another place
	transport commercially
	cause to go somewhere
	cause to be admitted; of persons to an institution