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.
credal creedal cordial cartel cordially curtal crudely greatly curtail gradual cordelle greedily gradually cradle curdle curtly courtly gardyloo
creedal credal chordal uredial tiredly serriedly praedial parietal ordeal gradual cordial gyroidal hurriedly varietal variedly bridal bradawl biradial redly redial radial peridial predial dreidl toroidal worriedly choroidal
credo cred ocreate curette cured curd crude cruddy crud cried creed create cord cored caret cared cardio cardiae cardia card cruet curdy curet acred screed