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.
doorbell drably drabble dribble dribbly durable durably tribally treble trebly tribal
barbell doorbell rebel rubel rubella barbel hairball harebell corbeil corbel gorbelly mirabelle cerebella sourball