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.
repaid rapid reaped repeat repped raped repot riped roped rapped repute ripped rouped wrapped
repaid paid pad chapati spied spaed spade padi pied vapid copied cupid keypad lipid rapid sapid lipide spado lipoid spait kneepad tepid poppied chappati
repay rep reap repo repp arepa crepe crepey crepy prep prepay preppie preppy