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.
brashly bearishly boorishly brachial biracial
rashly brashly bearishly boorishly fairishly freshly harshly currishly garishly trashily whorishly
brash brashy brach brachia brush brushy