duct vs airway

duct and airway both are nouns.

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

As nouns, airway is a hyponym of duct; that is, airway is a word with a more specific, narrower meaning than duct:

Other hyponyms of duct include air-intake, air duct, air passage.

duct (noun)	airway (noun)
an enclosed conduit for a fluid	a commercial enterprise that provides scheduled flights for passengers
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance	a duct that provides ventilation (as in mines)
a continuous tube formed by a row of elongated cells lacking intervening end walls	the passages through which air enters and leaves the body
	a designated route followed by airplanes in flying from one airport to another