prevalent vs predominant

prevalent and predominant both are adjectives.

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

As adjectives, prevalent and predominant are synonyms defined as:

Other synonyms of prevalent include dominant, prevailing, rife.

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