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.
fan fawn fain fane fano faun fauna fawny faena fanny van fon fin fen faunae fun fine fino fohn foin vain vane feign fenny finny foehn funny