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.
puttylike potlike poetlike petallike podlike putlog
puttylike batlike suitlike ratlike potlike oatlike netlike gnatlike boatlike fatlike footlike hatlike hutlike toylike jutelike catlike gatelike goatlike gutlike kitelike ladylike moatlike knotlike nutlike poetlike jetlike rootlike sheetlike