diatomite vs diatomaceous earth

diatomite and diatomaceous earth both are nouns.

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

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

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

Other synonyms of diatomite include kieselguhr.

diatomite (noun)	diatomaceous earth (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