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.
appels appeals appals apples appellees appalls applies appulse appaloosa apollos applause
appels cupels lapels chapels rappels repels peoples peplus pols fipples appeals hopples peles repeals puls peals nipples pals sepals speils spiels dapples tipples tupelos whooplas plus appals peels keypals couples maples nopals peepuls peplos huipils popples hooplas opals apples pipals ripples speels spells supples tepals topples wheeples pupils copals
appeal appel appellee appal appall apple apply