bronchiole vs epithelial duct

bronchiole and epithelial duct both are nouns.

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

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

bronchiole: any of the smallest bronchial ducts; ending in alveoli
epithelial duct: a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance

Other hypernyms of bronchiole include canal, channel, duct.

bronchiole (noun)	epithelial duct (noun)
any of the smallest bronchial ducts; ending in alveoli	a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance