law of partial pressures vs natural philosophy

law of partial pressures and natural philosophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
law of partial pressures	Yes	No	No	No
natural philosophy	Yes	No	No	No

law of partial pressures (noun)	natural philosophy (noun)
(chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature	the science of matter and energy and their interactions