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.
grossed grassed groused crossed crosshead greased caressed caroused crosstie cuirassed grazed cursed graced cresset cruised creased coursed creosote grisette grist corset crazed cruset coerced cristae crusade goriest
grossed crossed trussed drowsed rearoused prissed groused grassed cuirassed caroused caressed horsed browsed harassed brassed aroused roused rosed roosed reissued pressed prosed dressed tressed chorussed
gross cross crosse grass grassy grouse grows