send vs sending

send is not a noun while sending is a noun.

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

send (noun)	sending (noun)
	the act of causing something to go (especially messages)

send (verb)	sending (verb)
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