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.
spails sepals spills spoils spiels speils spalls spales spiles sepalous spools speels splays spells sapless supples soapless soupless supplies splice
pails spails pals palls pales huipiles copals nopales palsy sepals pupils pawls repeals spales speils spiles spoils tepals opals pipals palais appeals pilis pills pilus poilus appalls appals piles huipils keypals nopals peals spalls spiels spills tapalos uppiles
spail sepal spale spall speil spiel spile spill splay spoil espial