I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
severe sever soever saver siver suaver sphere savvier safer savor savior savory savour sigher sphery suffer sypher saviour savoury
revere severe hoover ever oeuvre sever faerie never livery paver quavery livier louver siver haver lover knavery jivier cover laver riviere quivery reverie shivery diver shaver wiver fiver weever wavier waver riever fever reaver sphere heaver reiver leavier every liver saver giver levier laveer hover quaver caver louvre fere beaver naiver mover very livre raver liever newwaver veer jiver rover over quiver leaver lever savvier referee river aver heavier revery soever vera aiver vier waiver wavery weaver bouvier whoever chevre suaver shiver shover