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.
rictus rectus rickets ricottas reacts rectos recuts rackets recoats rockets requites ragouts recodes roquets regattas
ictus rectus rictus cactus recuts ducts cats dicots coitus scuts cots scots cuds quietus rectos cuts reacts facts scats acts scuds coacts sects pacts ducats picots tacts
recta recti recto ricked rickety ricotta wricked bricked ericoid cricked cricket cricoid pricked pricket tricked tricot