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.
callan clan clean kalian gallon cullion galloon gallein colleen galleon cauline clon clone colon colin cline clown glean colone coloni colony galena kaolin kaoline
callan lallan aeolian elain elan fallen villain clan bouillon gallon blain kalian mullen plan pollen silane solan sullen tolan uhlan woollen glean lain blawn flan alane lane alan loan llano lean clean lawn eolian ballon billon plain plane reloan slain solano xylan tolane ulan yulan
call callee callow calla coaly scall collie gally calo caul coal coala colly cully gall galley cull scale cullay scaly