law of gravitation vs universal gravitational constant

law of gravitation and universal gravitational constant both are nouns.

Word	Noun	Adjective	Verb	Adverb
law of gravitation	Yes	No	No	No
universal gravitational constant	Yes	No	No	No

law of gravitation (noun)	universal gravitational constant (noun)
(physics) the law that states any two bodies attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them	(physics) the universal constant relating force to mass and distance in Newton's law of gravitation