preponderate vs predominate

preponderate is not an adjective while predominate is an adjective.

Word	Noun	Adjective	Verb	Adverb
preponderate	No	No	Yes	No
predominate	No	Yes	Yes	No

As verbs, predominate is a hypernym of preponderate; that is, predominate is a word with a broader meaning than preponderate:

Other hypernyms of preponderate include dominate, prevail, reign, rule.

preponderate (adjective)	predominate (adjective)
	having superior power and influence

preponderate (verb)	predominate (verb)
weigh more heavily	be larger in number, quantity, power, status or importance
	appear very large or occupy a commanding position