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.
compere compare compeer camper campier camporee
ampere compere impure gimpier jimper jumpier campier compeer humpier hempier lamprey compare mumper pampero romper simper dumper tamper tempera whimper champer lumper vampire humper hamper vampier moper vamper empire empery bumpier camper bumper jumper limper lumpier pamper pumper sempre damper dumpier temper umpire wimpier chomper