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.
cat cate coat catty coati kat cut cad qat cattie coatee gat cot gait goat coda gate cote cadi cade kata coot cute caid cotta cutty cutie cutey caddy quate caddie codeia cootie coteau cottae gaiety gateau goatee