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.
annoy any anna anoa awny an ain ana ane ani awn anew
annoy tannoy fanny bunny bonny nanny penny punny sunny snowy finny sonny tinny wenny winnow shinney fenny funny runny ginny hinny jenny johnny canny gunny minnow minny ninny pinny benny tunny whinny shanny shinny