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.
quad quid quod qaid qadi quota quate queued cud cad qat gad quit goad gude gaed cadi cued gadi kudu cade guid caid kadi gaud kudo gaddi quite quoit caddy quiet gaudy guide cuddy coude gutta quote
qua quai quay quack quacky quag quagga quaggy quake quaky