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.
react recta recti recto recut racket recoat regatta rackety racked roquet rocket recked ragout recode requite rickety wracked wreaked wrecked hyracoid roquette
react act acta begat fact cacti coact pact recta recti recto recut sect tact tecta
rec freak drecky rerack reargue creaky creak cracky crack freaky break rack areca wreck wreak wrack reck dreck track