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.
moulter molter moulder mouldier muleteer melter milter molder moldier maltier multure miltier melder milder military militaria malodor
vaulter poulter coulter moulter realter diluter liter slater bolter salter kelter aulder flutier halter jilter filter flouter zoolater shelter ultra fluter later philter faultier politer kultur maltier milter molter vaultier joltier pelter saluter haltere clouter boulder saltier dilater poultry siltier clutter relater jolter moulder billeter falter colter alter flutter welter sultry tilter elater violater belter balloter guiltier kilter quilter melter miltier palter plater polluter shoulder
moult molt molto mould mouldy mulatto muleta smolt