predominant vs preponderant

predominant and preponderant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
predominant	No	Yes	No	No
preponderant	No	Yes	No	No

As adjectives, predominant and preponderant are synonyms defined as:

Other synonyms of predominant include overriding, paramount, predominate, preponderating.

predominant (adjective)	preponderant (adjective)
having superior power and influence	having superior power and influence
most frequent or common