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.
fawny fawn fanny fan fain fane fano faun finny funny faena fenny fauna faunae fen fin fon fun van fine fino fohn foin vain vane viny
awny tawny fawny lawny any awn mawn downy fawn pawn winy waney lawn meany sawney shawn canny shanny many zany rainy sawn guanay fanny towny wany tawney gnawn dawn nanny yawn