pipework vs organ pipe

pipework and organ pipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
pipework	Yes	No	No	No
organ pipe	Yes	No	No	No

As nouns, pipework and organ pipe are synonyms defined as:

Other synonyms of pipework include pipe.

pipework (noun)	organ pipe (noun)
the flues and stops on a pipe organ	the flues and stops on a pipe organ