dissolution vs natural action

dissolution and natural action both are nouns.

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

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

dissolution: separation into component parts
natural action: a process existing in or produced by nature (rather than by the intent of human beings)

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

dissolution (noun)	natural action (noun)
the termination or disintegration of a relationship (between persons or nations)	a process existing in or produced by nature (rather than by the intent of human beings)
the termination of a meeting
dissolute indulgence in sensual pleasure
separation into component parts
the process of going into solution