chemical change vs chemistry

chemical change and chemistry both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemical change	Yes	No	No	No
chemistry	Yes	No	No	No

chemical change (noun)	chemistry (noun)
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved	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