pass over vs air

pass over is not a noun while air is a noun.

Word	Noun	Adjective	Verb	Adverb
pass over	No	No	Yes	No
air	Yes	No	Yes	No

pass over (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

pass over (verb)	air (verb)
bypass	expose to cool or cold air so as to cool or freshen
rub with a circular motion	expose to warm or heated air, so as to dry
travel across or pass over	make public
make a passage or journey from one place to another	broadcast over the airwaves, as in radio or television
fly over	be broadcast
	expose to fresh air