theory of organic evolution vs theory of evolution

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

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

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

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

Other synonyms of theory of organic evolution include evolutionism.

theory of organic evolution (noun)	theory of 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