law of definite proportions vs chemistry

law of definite proportions and chemistry both are nouns.

Word	Noun	Adjective	Verb	Adverb
law of definite proportions	Yes	No	No	No
chemistry	Yes	No	No	No

law of definite proportions (noun)	chemistry (noun)
(chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight	the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
	the way two individuals relate to each other
	the chemical composition and properties of a substance or object