chemistry vs Ostwald's theory of indicators

chemistry and Ostwald's theory of indicators both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemistry	Yes	No	No	No
Ostwald's theory of indicators	Yes	No	No	No

chemistry (noun)	Ostwald's theory of indicators (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociation
the way two individuals relate to each other
the chemical composition and properties of a substance or object