chemistry vs relative atomic mass

chemistry and relative atomic mass both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemistry	Yes	No	No	No
relative atomic mass	Yes	No	No	No

chemistry (noun)	relative atomic mass (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) the mass of an atom of a chemical element expressed in atomic mass units
the way two individuals relate to each other
the chemical composition and properties of a substance or object