send vs rerun

send is not a noun while rerun is a noun.

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

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

Other hyponyms of send include satellite, sportscast, telecast, televise, interrogate, rebroadcast.

send (noun)	rerun (noun)
	a program that is broadcast again

send (verb)	rerun (verb)
cause to be directed or transmitted to another place	cause to perform again
transfer	broadcast again, as of a film
broadcast over the airwaves, as in radio or television	run again for office
assign to a station	rerun a performance of a play, for example
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