Gay-Lussac's law vs Charles's law

Gay-Lussac's law and Charles's law both are nouns.

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

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

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

Other synonyms of Gay-Lussac's law include law of volumes.

Gay-Lussac's law (noun)	Charles'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