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.
clad clade yclad colead glad clod cold cleat claddagh could cauld glade clued cloud glady coled cooled cloddy culled coaled cloudy cowled called coiled collied colloid cullied collide collate collude clot cult gled colt gold cloot clout culti glede gleed glide gloat glued guild culet
lad ballad clad glad yclad salad