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.
spiles spills spales spoils spiels speils spails supples sapless soapless soupless supplies sepals spalls speels spells splays splice spools zipless sepalous zeppoles
piles spiles uppiles huipiles duopolies tipless supplies zipless pails spoils plews maypoles peles poleis poles polies pleas pollees pulleys fipples reapplies shapeless cupules capless nipples poilus papules pipeless popples apples lipless soapless spails speils pilus hipless topless ripples tipples spiels pills huipils gapless plies hopeless pales applies pilis nopales hapless hoopless hopples maples pileus diploes napless couples spills appellees tapeless dipoles dapples zeppoles supples spales pules wheeples sapless replies pupils popeless peoples topples soupless shipless
spile spill spail spale spall speil spell spiel splay spoil espial