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.
cocotte coact coquette cocked cooked cockade cookout cockatoo coequate cuckooed cacti coked cogged coquet coquito
cocotte cote cotta cottae boycott picotee ricotta scottie cot