Archrivals rhymes with:
approvals, arrivals, carnival's, carnivals, crovls, daredevils, devil's, devils, devils', evils, festival's, festivals, hovels, intervals, level's, levels, marvel's, marvels, nevels, nevils, novel's, novels, removals, revels, revivals, rival's, rivals, rivals', shovels, sivils, swivels, travels, unravels, upheavals, weevils