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.
cloddy cloudy clod cloud clotty colloid clot cold clad claddagh clout coled could clade cauld glady yclad clued cloot coiled coaled called colead cooled culled keloid cowled calotte collide collied collude cullied culotte
cloddy bloody cloudy melody moldy oldy ploidy