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.
praetor pretor prater parader parador prettier perter predry prodder prudery partier prouder pearter purtier parroter parterre porter perdure portray
praetor retore hydrator sartor barrator barretor aerator feretory gyrator gyratory juratory creator curator moratory narrator orator oratory pretor deaerator traitor
prat pirate prate pretty proette sprat uprate