chemistry vs law of reciprocal proportions

chemistry and law of reciprocal proportions both are nouns.

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

chemistry (noun)	law of reciprocal proportions (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) law stating that the proportions in which two elements separately combine with a third element are also the proportions in which they combine together
the way two individuals relate to each other
the chemical composition and properties of a substance or object