air vs nosedive

air and nosedive both are nouns.

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

air (noun)	nosedive (noun)
travel via aircraft	a steep nose-down descent by an aircraft
a distinctive but intangible quality surrounding a person or thing	a sudden sharp drop or rapid decline
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

air (verb)	nosedive (verb)
expose to cool or cold air so as to cool or freshen	plunge nose first; drop with the nose or front first, of aircraft
expose to warm or heated air, so as to dry
make public
broadcast over the airwaves, as in radio or television
be broadcast
expose to fresh air