labial pipe vs flue pipe

labial pipe and flue pipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
labial pipe	Yes	No	No	No
flue pipe	Yes	No	No	No

As nouns, labial pipe and flue pipe are synonyms defined as:

labial pipe and flue pipe: organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip

Other synonyms of labial pipe include flue.

labial pipe (noun)	flue pipe (noun)
organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip	organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip