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.
mutule mutuel mutual mutually module motile mutely muddle motley mettle mottle medullae metal metol motel muddly medley moduli modulo middle meetly meddle meatal meatily medulla muddily
tule mutule tole tile tele cuittle guttle kittle tulle mettle motile mottle mutuel battle outlie nettle pottle rattle ritual rutile settle stele stole style tattle tittle utile whittle mutual beetle motley tale bottle fettle footle futile vittle cattle butle caudle cuttle kettle little module nodule pettle radulae retile rootle citole stale stile stull dottle title tootle wattle shuttle
mut maut mute mutt smut smutty