cosmogonic vs cosmogonical

cosmogonic and cosmogonical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
cosmogonic	No	Yes	No	No
cosmogonical	No	Yes	No	No

As adjectives, cosmogonic and cosmogonical are synonyms defined as:

cosmogonic and cosmogonical: pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe

Other synonyms of cosmogonic include cosmogenic, cosmologic, cosmological.

cosmogonic (adjective)	cosmogonical (adjective)
pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe	pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe