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.
cold could coled coaled cowled colead coiled cooled clod gold clad colt collied collude collide colloid cauld yclad clade cloud clued goaled collet gaoled cloudy called culled cloddy cullied collate claddagh glad gled clot cult cleat glady gleed cloot glide culti glede clout culet glade guild glued
bold fold hold cold gold mold old sold told wold
col cola cole collie colly coly