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.
calory calorie color glory clour clary galore coaler caller colour gallery couloir coalier colliery clear claro glary collar colure cooler culler galere gaoler glairy gloria coiler collier galleria
lory calory pillory glory sealery valour lorry raillery flour hellery bailor jailor lour dolour volery foolery loury alary galore velour color sailor clary floury gallery couloir glary celery pylori floor fluor pallor dolor fullery salary flora colour clour lore valor phyllary tailor
calo call calla callee callow caul cloy coal coala coaly aglow scale scall scaly