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.
can cain cane canna canny canoe gan con cannie gaen koan conn kane gane kain coin guan gaun cone coni coon kana cony kaon gain coign coney guano quean goanna guanay