biology vs theory of evolution

biology and theory of evolution both are nouns.

Word	Noun	Adjective	Verb	Adverb
biology	Yes	No	No	No
theory of evolution	Yes	No	No	No

biology (noun)	theory of evolution (noun)
the science that studies living organisms	(biology) a scientific theory of the origin of species of plants and animals
all the plant and animal life of a particular region
characteristic life processes and phenomena of living organisms