Argil and China clay

Argil noun - A white clay (especially a white clay used by potters).

China clay and argil are semantically related in clay for making pottery topic. In some cases you can use "China clay" instead a noun "Argil".

China clay 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).

Argil and china clay are semantically related in clay for making pottery topic. You can use "Argil" instead a noun phrase "China clay".