Tobacco pipe and Water pipe

Tobacco pipe noun - A tube with a small bowl at one end; used for smoking tobacco.

Water pipe and tobacco pipe are semantically related. In some cases you can replace phrase "Water pipe" with "Tobacco pipe", this phrases are similar.

Water pipe noun - An oriental tobacco pipe with a long flexible tube connected to a container where the smoke is cooled by passing through water.

Tobacco pipe and water pipe are semantically related. Sometimes you can use "Tobacco pipe" instead a noun phrase "Water pipe".