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.
sottedly stately steadily studly staidly stoutly sedately statal staddle
mattedly heatedly mutedly datedly sottedly pettedly notedly pedately stately sedately fadedly mediately jadedly fetidly addedly deadly studly radiately