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.
sileni silane sullen salon slain solan solon salina saline saloon solano solion xylene zillion
sileni villein woolen sullen relleno poleyn plena mullen melena lien alien baleen blini fallen lean colleen clean coloni galena gallein galleon glean glen mullein olein pleon pollen leno xylene woollen
sail sale scilla sill silly silo slew sloe slue soil sole solei isle