Flue pipe and Organ pipe

Flue pipe noun - Organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip.

Organ pipe and flue pipe are semantically related. In some cases you can use "Organ pipe" instead a noun phrase "Flue pipe".

Organ pipe noun - The flues and stops on a pipe organ.

Flue pipe and organ pipe are semantically related. Sometimes you can replace phrase "Flue pipe" with "Organ pipe", this phrases are similar.