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.
sorel sorrel sorely saurel sourly surely sorrily surreal zoril seral sural ceorl surly surreally cereal serail serial zoarial zorilla zorille zorillo serially
morel sorel loreal reel loral quarrel cruel goral rely areal riel merely ariel boral purely parrel ceorl oriel saurel sorely surely zoril ureal choral shorl barely coral laurel rarely gruel creel gooral carrel jurel irreal carrell real ferrel horal orle poorly oral cereal moral boreal barrel sorrel surreal direly whorl choreal yarely
sore saree sere sire siree soar soiree sora sori sorrow sorry sour sure