reaction vs chemistry

reaction and chemistry both are nouns.

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

reaction (noun)	chemistry (noun)
a bodily process occurring due to the effect of some antecedent stimulus or agent	the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
doing something in opposition to another way of doing it that you don't like	the way two individuals relate to each other
an idea evoked by some experience	the chemical composition and properties of a substance or object
extreme conservatism in political or social matters
(mechanics) the equal and opposite force that is produced when any force is applied to a body
a response that reveals a person's feelings or attitude
(chemistry) a process in which one or more substances are changed into others