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.
sonny sunny son sone sunn soon sown scion senna sunna snowy hyson sinewy sunnah sienna sawney syn sen sun sin zone zany syne sene snaw sinh sane sign snow sawn cion seen sine sewn sain zona zoon
bonny sonny looney annoy gunny gooney canny conn benny bonne boney loony money bunny bony ninny pony moony runny sunny donne tannoy toney tony tunny whinny shinney peony jenny goony mony cony johnny coney honey hinny phony ginny fenny funny phoney penny pinny nanny punny minny finny fanny donna downy tinny tonne towny wenny shanny shinny