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.
coot cot cootie coat cote cotta cooed coati coatee coteau cottae cooeed cut cod got cat couteau coda code goat coed koto good cate gout cute catty coude cutey cutie cutty goody gouty kotow quoit quota quote
boot foot hoot coot loot moot oot root soot toot shoot
coo cooee cooey coocoo cook cookey cookie cooky