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.
dipole diploe duple dapple tipple duopoly deeply deploy dopily topple
pole maypole dipole zeppole pol cupola people apple repoll fipple spale maple pool plea supple nipple spool zeppoli diploe duopoly tipple uppile pile spile poly pale dapple polo ripple popple papule cupule pule hopple spoil pele plew plie couple poll duple topple wheeple