chimneypot vs pipage

chimneypot and pipage both are nouns.

Word	Noun	Adjective	Verb	Adverb
chimneypot	Yes	No	No	No
pipage	Yes	No	No	No

As nouns, pipage is a hypernym of chimneypot; that is, pipage is a word with a broader meaning than chimneypot:

chimneypot: a short earthenware pipe on the top of a chimney to increase the draft
pipage: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of chimneypot include pipe, piping.

chimneypot (noun)	pipage (noun)
a short earthenware pipe on the top of a chimney to increase the draft	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
	a fee charged for the use of pipes