epithelial duct vs passageway

epithelial duct and passageway both are nouns.

Word	Noun	Adjective	Verb	Adverb
epithelial duct	Yes	No	No	No
passageway	Yes	No	No	No

As nouns, passageway is a hypernym of epithelial duct; that is, passageway is a word with a broader meaning than epithelial duct:

epithelial duct: a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
passageway: a path or channel or duct through or along which something may pass

Other hypernyms of epithelial duct include passage.

epithelial duct (noun)	passageway (noun)
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance	a passage between rooms or between buildings
	a path or channel or duct through or along which something may pass