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.
flitched fletched filched fleeched flashed fleshed flushed flechette flysheet
latched flitched clutched letched blotched fletched leched slouched filched mulched cliched leached bleached fleeched leeched latchet pleached belched welched