law of volumes vs law of nature

law of volumes and law of nature both are nouns.

Word	Noun	Adjective	Verb	Adverb
law of volumes	Yes	No	No	No
law of nature	Yes	No	No	No

As nouns, law of nature is a hypernym of law of volumes; that is, law of nature is a word with a broader meaning than law of volumes:

law of volumes: (physics) the density of an ideal gas at constant pressure varies inversely with the temperature
law of nature: a generalization that describes recurring facts or events in nature

Other hypernyms of law of volumes include law.

law of volumes (noun)	law of nature (noun)
(physics) the density of an ideal gas at constant pressure varies inversely with the temperature	a generalization that describes recurring facts or events in nature