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.
shortly chortle shrewdly shirttail chordal choroidal
portly shortly whortle tartly tartily dirtily portal pertly partly peartly mortal lordly curtly courtly heartily artily chortle aortal
short shortie shorty shirt shirty shored