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.
cleaver claver clever clavier clover culver clovery glover calvary calvaria cliffier golfer gulfier
leaver cleaver delver slaver laveer laver leavier lever levier liever believer elver claver clavier clever palaver reliever salver slavery shelver