filtration vs natural process

filtration and natural process both are nouns.

Word	Noun	Adjective	Verb	Adverb
filtration	Yes	No	No	No
natural process	Yes	No	No	No

As nouns, natural process is a hypernym of filtration; that is, natural process is a word with a broader meaning than filtration:

filtration: the process whereby fluids pass through a filter or a filtering medium
natural process: a process existing in or produced by nature (rather than by the intent of human beings)

Other hypernyms of filtration include action, activity, natural action.

filtration (noun)	natural process (noun)
the act of changing a fluid by passing it through a filter	a process existing in or produced by nature (rather than by the intent of human beings)
the process whereby fluids pass through a filter or a filtering medium