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.
colt collet cult cold clot collate cleat culti clout coled culet cloot could cullet cooled clotty cowled coiled colead coaled callet culotte colloid collied collide collude calotte gold glut kilt clod kelt clad clued quilt glute cloud guilt cauld glout clade gleet gault kilty gloat yclad
bolt volt holt jolt colt molt dolt
col cola cole collie colly coly