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.
zeppoles supples zipless supplies sepals spools spales spiles spoils sapless soapless soupless sepalous spiels spills splays spails spalls speels speils spells
maypoles poles dipoles zeppoles pols diploes plies piles hipless cupolas napless lipless plews maples gapless apples ripples replies pools pales peles reapplies repolls sapless soupless spiles spools supplies duopolies tipples topples wheeples peoples poleis capless polos nipples papules popples fipples pules couples cupules huipiles hapless spales hoopless soapless nopales zipless polys applies polls polis polies spoils pleas dapples supples hopples tipless topless uppiles shipless