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.
cheddar cheddary chuddar chadar cheder shedder chudder cheater chador chadri chider chatter shudder chowder chitter chattery chattier shoddier shuddery shader shadier shatter sheeter shooter shouter shutter
cheddar bedder redder redear cedar cedary deodar tedder wedder cheddary chuddar shedder