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.
savors savours saviors saviours savories savorous savers savouries sivers severs sofars safaris suffaris sighers spheres suffers syphers zaffars zaffers zaffirs
favors bevors savors chevres dyvours wavers sivers devours fevers savours louvers aivers quivers vivers havers haviors heavers feoffors weevers shivers jivers covers leavers fivers lovers navars oeuvres pavers paviours reavers revers rivers savers saviours hovers livers vars overs hoovers paviors quavers lavers cavers givers livres beavers fores fours movers louvres favours ravers newwavers haviours reivers rievers rovers saviors levers avers ephors severs devoirs divers waivers weavers wivers shavers shovers
savor savory savour savoury saver savior saviour savvier suaver