Whoever rhymes with:
bever, clever, devore, endeavor, endeavour, ever, forever, grever, haver, however, kever, klever, kochevar, lever, mcever, morever, never, sever, trevor, whatever, whatsoever, whenever, wherever, whichever, whomever, whomsoever, whosoever
Whoever sounds like:
wafer, waifer, waiver, waver, wavra, weaver, webber, weber, webre, weeber, wever, whobrey, whopper, wieber, wiper, woofer