law of volumes vs Gay-Lussac's law

law of volumes and Gay-Lussac's law both are nouns.

Word	Noun	Adjective	Verb	Adverb
law of volumes	Yes	No	No	No
Gay-Lussac's law	Yes	No	No	No

As nouns, law of volumes and Gay-Lussac's law are synonyms defined as:

law of volumes and Gay-Lussac's law: (physics) the density of an ideal gas at constant pressure varies inversely with the temperature

Other synonyms of law of volumes include Charles's law.

law of volumes (noun)	Gay-Lussac's law (noun)
(physics) the density of an ideal gas at constant pressure varies inversely with the temperature	(physics) the density of an ideal gas at constant pressure varies inversely with the temperature