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.
riever river reiver revere revery reaver riviere reverie riviera refer rifer raver rover reefer reefier referee reifier reoffer refry refire roofer rougher
fever riever never weever sever lever whoever soever ever liever savvier rover aver mover lover heaver leavier quavery revere bouvier revery knavery giver hoover suaver fiver hover river shivery shaver chevre weaver aiver beaver refer jivier reaver paver newwaver naiver laver vier bevor reiver veery laveer veer vera cover very liver livery liefer leaver quiver wavier louver levier severe every saver wavery heavier haver raver waiver siver defer caver quaver over quivery livier reefer diver waver jiver wiver chiefer shiver shover
rev rive drive privy prevue preview grieve grief brief breve rife reave revue review reive reeve reavow driegh trivia