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.
nail nil nala nill noil noily nielli niello noel nolo null kneel knell knoll nelly newly
ail bail fail vail hail jail kail quail mail nail pail rail sail tail wail al