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.
studly stoutly staidly sottedly steadily staddle stately sedately statal citadel
studly addedly fadedly steadily sottedly diddly dowdily tautly tiddly tidily diddley fetidly deadly heatedly jadedly mattedly mutedly notedly pettedly staidly stoutly datedly
stud studdie studio study situate stade stadia stout sueded astute