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.
groused grossed caroused greased cruised grassed coursed crossed crosshead cursed grazed cruset graced crusade creased crusado grisette creosote crosstie caressed crust cuirassed grist corset crazed crusty coerced cresset cristae goriest
roused aroused rearoused groused caroused cursed chorused coursed drowsed rosed pursed horsed perused grossed bruised reused nursed crossed prosed browsed cruised trussed roosed chorussed
grouse crouse gross grows grues gurus