leaching vs natural action

leaching and natural action both are nouns.

Word	Noun	Adjective	Verb	Adverb
leaching	Yes	No	No	No
natural action	Yes	No	No	No

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

leaching: the process of leaching
natural action: a process existing in or produced by nature (rather than by the intent of human beings)

Other hypernyms of leaching include action, activity, natural process.

leaching (noun)	natural action (noun)
the process of leaching	a process existing in or produced by nature (rather than by the intent of human beings)