We don't have synonyms for preval yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are prevail, predal and reval.
°To be superior in strength, dominance, influence or frequency; to have or gain the advantage over others; to have the upper hand; to outnumber others.
°To be superior in strength, dominance, influence or frequency; to have or gain the advantage over others; to have the upper hand; to outnumber others.