Restrains rhymes with:
constrains, strains, constrains, strains, train's, trains, bahrain's, brain's, brains, cabranes, constrains, crain's, crane's, cranes, drains, grains, raines, rains, ranes, raynes, refrains, reigns, reines, reins, sprains, strains, train's, trains, ukraine's
Restrains sounds like:
racketeering, registering, restoring, restraining, restrooms