send vs air

send is not a noun while air is a noun.

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

As verbs, send and air are synonyms defined as:

Other synonyms of send include beam, broadcast, transmit.

As verbs, air is a hypernym of send; that is, air is a word with a broader meaning than send:

Other hypernyms of send include bare, publicise, publicize.

send (noun)	air (noun)
	travel via aircraft
	a distinctive but intangible quality surrounding a person or thing
	a succession of notes forming a distinctive sequence
	medium for radio and television broadcasting
	the region above the ground
	the mass of air surrounding the Earth
	a slight wind (usually refreshing)
	a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of
	once thought to be one of four elements composing the universe (Empedocles), associated with the humour blood

send (verb)	air (verb)
cause to be directed or transmitted to another place	expose to cool or cold air so as to cool or freshen
transfer	expose to warm or heated air, so as to dry
broadcast over the airwaves, as in radio or television	make public
assign to a station	broadcast over the airwaves, as in radio or television
to cause or order to be taken, directed, or transmitted to another place	be broadcast
transport commercially	expose to fresh air
cause to go somewhere
cause to be admitted; of persons to an institution