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.
coquet coquette coquito coequate cookout coact coked cocked cogged cooked quaked cockade cocotte quacked cockatoo cuckooed
bouquet coquet piquet roquet toquet quiet quit baguet loquat piqued squat diquat chaqueta