theory of evolution vs theory of organic evolution

theory of evolution and theory of organic evolution both are nouns.

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

As nouns, theory of evolution and theory of organic evolution are synonyms defined as:

theory of evolution and theory of organic evolution: (biology) a scientific theory of the origin of species of plants and animals

Other synonyms of theory of evolution include evolutionism.

theory of evolution (noun)	theory of organic evolution (noun)
(biology) a scientific theory of the origin of species of plants and animals	(biology) a scientific theory of the origin of species of plants and animals