airway vs respiratory tract

airway and respiratory tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
airway	Yes	No	No	No
respiratory tract	Yes	No	No	No

As nouns, airway and respiratory tract are synonyms defined as:

airway and respiratory tract: the passages through which air enters and leaves the body

airway (noun)	respiratory tract (noun)
a commercial enterprise that provides scheduled flights for passengers	the passages through which air enters and leaves the body
a duct that provides ventilation (as in mines)
the passages through which air enters and leaves the body
a designated route followed by airplanes in flying from one airport to another