Predominant rhymes with:
dominant, dominant, prominent, contaminant, determinant, dominant, eminent, immanent, imminent, permanent, preeminent, prominent, ruminant, semipermanent
Predominant sounds like:
pardoned, partitioned, pertained, pertinent, portend, portent, portinadi, predominate, predominated, preordained, pretend, pretended, prudent, prudente