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.
predry prudery perter porter pretor prater pearter prodder parader parador partier portray praetor prouder purtier parroter prettier perdure parterre portiere
redry predry retry rudery artery barretry breeder broidery prudery tireder
pard pardah pureed purda proette priedieu pardee pardi pardie pardy pared perdie perdu perdue perdy pored preed pretty pride pried prod prude purdah spread