theory of evolution vs evolutionism

theory of evolution and evolutionism both are nouns.

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

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

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

Other synonyms of theory of evolution include theory of organic evolution.

theory of evolution (noun)	evolutionism (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