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.
pretor praetor prettier perter prater predry prudery prodder parader parador partier pearter prouder purtier parroter porter perdure portray parterre portiere
barretor pretor praetor gyratory traitor gyrator hydrator heritor sartor barretry feretory retore curator creator juratory ferreter oratory moratory orator barrator rotor retry retro greeter narrator aerator deaerator territory ureter
pretty pared purty prutah part party pert pored port prat prate preed pried priedieu proette protea protei pruta pureed spread