Kepler's second law vs law of areas

Kepler's second law and law of areas both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kepler's second law	Yes	No	No	No
law of areas	Yes	No	No	No

As nouns, Kepler's second law and law of areas are synonyms defined as:

Kepler's second law and law of areas: a law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times

Other synonyms of Kepler's second law include law of equal areas.

Kepler's second law (noun)	law of areas (noun)
a law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times	a law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times