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.
wheatless wattless wattles witless weedless wheedles whittles waddles whitlows woodless wedels widdles wittols
beatless seatless hatless meatless fatless matless heatless coatless wheatless mateless witless toadless noteless puttyless battles knotless bootless netless gateless idealess voteless pitiless sheetless gutless sodaless idealless wattless wattles chadless leadless rootless feetless footless tattles dateless hitless roadless headless rattles poetless shitless