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.
bred breed bored brede bread bared birred buried barred burred bready bird bard brad burd berried brood bride broad board buret beret brute barde beard braid berate boride broody baryte burdie borate barret byroad hybrid birdie barite beretta biretta burette bort birretta brut bourride brit barrette brat berretta boart borty britt bruit
red sered cered marred purred chared bored jeered ired tyred paired bred parred bared birred garred soared cored moored neared burred gnarred sheared cured aired shred shirred churred cheered wired wared tired reared haired choired pored heired whirred teared barred soured queered deaired loured tared gyred laired seared pared mured erred knarred mired cared sired curred feared furred faired cred oared toured hired jarred fared chaired poured lured roared shared eared quired hared geared dured leered dared gored sored fired tarred warred peered shored chirred veered rared tiered waired whored charred chored sheered yirred