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.
nopales nopals napless nipples noplace nauplius
pales nopales spales pals hopples fipples apples spails pules poles peals plews nopals plies pipals papules sapless peles appalls capless soapless couples gapless lipless maypoles nipples spalls supples zeppoles dapples dipoles tepals tipples topples wheeples reapplies opals appals peoples replies napless hapless hipless cupules maples appeals applies pails palls palsy huipiles hoopless copals piles popples supplies uppiles topless tipless tapalos diploes zipless spiles pawls pleas keypals soupless sepals ripples repeals shipless