diatomite vs kieselguhr

diatomite and kieselguhr both are nouns.

Word	Noun	Adjective	Verb	Adverb
diatomite	Yes	No	No	No
kieselguhr	Yes	No	No	No

As nouns, diatomite and kieselguhr are synonyms defined as:

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

Other synonyms of diatomite include diatomaceous earth.

diatomite (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