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.
kneel knell noel knoll nelly newly niello nielli nellie knolly nil nail nala nill noil nolo null
kneel eel eely feel heel keel knell noel peel reel seel seely teel weel wheel
knee nee knew kane keen kine kune nene