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.
colitis colts collets collides collates cults colds colloids clots qualities cultus cleats cloots culets clouts callets glottis kilties galiots cullets coleads culottes calottes colludes galliots golds glitz gluts clods kilts clads kelts gleets clouds glides guilts gloats glitzy glouts glutes gaults clades caulds quilts gallets galoots gluteus gullets keloids
colitis lits ileitis illites iolites jollities velleities gelatis halitus kilties galiots mullites oolites plaits realities salties zeolites tallits shelties lealties phyllites halites galliots flits laities flites fealties elites blites litas velites qualities lilts nullities pelites polities realties slits dualities tillites hyalites