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.
showery shower showier shewer chawer chewer chewier
bowery showery lowery dowery towery mower vower lower tower aweary beweary bower power cower weary rower sower dower cowier shower knower showier