Kaolin and Pipeclay

Kaolin noun - A fine usually white clay formed by the weathering of aluminous minerals (as feldspar); used in ceramics and as an absorbent and as a filler (e.g., in paper).

Pipeclay and kaolin are semantically related. In some cases you can use "Pipeclay" instead a noun "Kaolin".

Pipeclay noun - Fine white clay used in making tobacco pipes and pottery and in whitening leather.

Kaolin and pipeclay are semantically related. You can use "Kaolin" instead a noun "Pipeclay".