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.
clean clan glean callan glen colleen clon cline clone clown colin colon colone coloni colony galena kalian cauline cullion gallein galleon kiln
lean clean glean ulan sullen xylene sileni solan pollen reloan plane pleon mullen plain gallein flan tolane woollen kalian callan alane alien clan eolian villein elain aeolian blawn blain baleen melena loan villain lien lawn lane alan llano elan galena lallan glen colleen lain galleon mullein leno fallen olein plan plena poleyn relleno silane slain solano xylan tolan uhlan woolen yulan
claw clay clew clue cola cole leakily legal legally cecal cecally