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.
apples applies appels appals appellees appalls appeals appulse applause appaloosa apollos
apples couples maples tipples hopples ripples nipples supples popples dapples fipples peoples topples wheeples cupules sepals hoopless pleas popeless napless appels soapless reapplies zipless pules pileus huipils sapless spales pols cupels poles topless shapeless whooplas uppiles tapeless pipeless dipoles capless zeppoles tipless plews pulleys piles gapless lipless hooplas supplies lapels peplos rappels spiles hopeless pales pupils replies maypoles repels applies peepuls copals plies appellees hipless poleis papules pipals puls nopales peplus huipiles nopals pals hapless opals appals plus peles duopolies diploes tepals soupless keypals pollees polies chapels shipless
apple apply apollo appal appall appeal appel appellee