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.
comedo comedy combed comet comte comade comate cameoed quomodo commode commute coembody gamed committee combat comity commit gammed gaumed gummed commata gambado
comedo med amido bummed roamed gamed lamed gaumed quomodo bombed seamed mead aimed meed domed lammed jammed homed imbed gemmed bammed dammed summed tombed shimmed shammed tamed chummed chammied mimed whammed teemed limed rammed rimed loomed dumbed nimmed mummied demoed remedy beamed boomed famed hemmed jimmied embed combed foamed limbed doomed jemmied jambed seemed hammed fumed lambed gummed lamedh gammed roomed comedy imido hummed deemed zoomed loamed rhymed dimmed named numbed dummied maimed rimmed reamed timed tommed wombed mummed chimed shamed teamed shammied shimmied
come came cameo coma comae comb combe combo comma commie commy coomb coombe acme