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.
rile riley rille role rale rail rule rial riel rill roil rouille reoil roily rouleau real reel rely roll ruly rally rawly relay wryly
bile file vile voile guile maile mile pile rile tile toile while wile chile