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.
rail roil riel rial real rile rale rill rawly rille reoil riley roily rally realia really rouille reel rely role roll rule ruly relay wryly
ail bail fail vail hail jail kail quail mail nail pail rail sail tail wail al