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.
seccos seacocks succahs succuss scags skegs squegs sacques squeaks
seccos cacaos cocoas cocos cogs guacos bocaccio coccous coccus macacos meccas rococos wiccas yuccas