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.
spales sepals spails spalls spiles supples sapless soapless soupless supplies sepalous speils spoils splays spools splice spells spiels spills speels zipless zeppoles
pales nopales spales cupules pipeless pules fipples hopeless keypals spiles supplies appalls popples topless hipless napless diploes pleas copals plies piles tapeless shapeless opals tipless duopolies zipless poleis apples pileus peles uppiles huipiles peoples polies repeals ripples sepals soupless maples palsy plews pails gapless spalls capless pawls appals pollees lipless hoopless peals palls zeppoles hopples pulleys dapples poles appellees spails maypoles couples soapless appeals sapless reapplies pals popeless supples nopals papules replies hapless applies tapalos pipals tepals tipples nipples topples wheeples dipoles shipless
spale spall sepal spail spell spile spill splay