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.
branner brannier brainier brawnier briner burner barnier brinier browner barrener brownier
branner learner yarner warner trainer drainer darner prawner groaner runner grinner grainer garner earner brannier runnier yearner
branny bran borane brain brainy brawn brawny buran