diatomaceous earth vs kieselguhr

diatomaceous earth and kieselguhr both are nouns.

Word	Noun	Adjective	Verb	Adverb
diatomaceous earth	Yes	No	No	No
kieselguhr	Yes	No	No	No

As nouns, diatomaceous earth and kieselguhr are synonyms defined as:

diatomaceous earth and kieselguhr: a light soil consisting of siliceous diatom remains and often used as a filtering material

Other synonyms of diatomaceous earth include diatomite.

diatomaceous earth (noun)	kieselguhr (noun)
a light soil consisting of siliceous diatom remains and often used as a filtering material	a light soil consisting of siliceous diatom remains and often used as a filtering material