send off vs route

send off is not a noun while route is a noun.

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

As verbs, route is a hyponym of send off; that is, route is a word with a more specific, narrower meaning than send off:

Other hyponyms of send off include bundle off.

send off (noun)	route (noun)
	an open way (generally public) for travel or transportation
	an established line of travel or access

send off (verb)	route (verb)
transfer	send via a specific route
throw, send, or cast forward	divert in a specified direction
send away towards a designated goal	send documents or materials to appropriate destinations