kaolin vs china clay

kaolin and china clay both are nouns.

Word	Noun	Adjective	Verb	Adverb
kaolin	Yes	No	No	No
china clay	Yes	No	No	No

As nouns, kaolin and china clay are synonyms defined as:

kaolin and china clay: 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)

Other synonyms of kaolin include china stone, kaoline, porcelain clay, terra alba.

kaolin (noun)	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)	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)