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.
kohl kolo kola koel koala col coal keel kail cool coly coil goal gaol kale kill kilo cola cowl cole coala coaly colly cooly coyly golly kelly quoll