chemistry vs sensitizer

chemistry and sensitizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemistry	Yes	No	No	No
sensitizer	Yes	No	No	No

chemistry (noun)	sensitizer (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) a substance other than a catalyst that facilitates the start of a catalytic reaction
the way two individuals relate to each other
the chemical composition and properties of a substance or object