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.
stiped stoped steeped stepped stooped stopped stupid stopt seedpod
stiped toped tittuped stoped dipped steeped retyped retaped redipped typed tupped topped tipped dapped tapped taped dupped duped doped stepped stooped stopped tittupped
stipe step steppe stop stope stupa stupe