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.
scowls sokols sculls socles scales scalls skoals suckles sickles secalose suckless sicklies sockless skills skells skulls siglos sequels squalls squeals squills seagulls skilless squillas
cowls scowls sokols coals guaiacols gigolos quolls kolos kolas kohls koels goals gaols glows recoals gallows cols coles colas coils vacuoles googols nicols recoils rugolas cools reglows skoals dayglows