airway vs tract

airway and tract both are nouns.

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

As nouns, tract is a hypernym of airway; that is, tract is a word with a broader meaning than airway:

airway (noun)	tract (noun)
a commercial enterprise that provides scheduled flights for passengers	a bundle of myelinated nerve fibers following a path through the brain
a duct that provides ventilation (as in mines)	a system of body parts that together serve some particular purpose
the passages through which air enters and leaves the body	a brief treatise on a subject of interest; published in the form of a booklet
a designated route followed by airplanes in flying from one airport to another	an extended area of land