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.
falsity felsite falsetto felicity villosity fliest fellest foulest fullest phallist vealiest velocity vilest volost flossed violist
falsity lusty blasty felsite villosity callosity gulosity pilosity wellsite
falsie fails falls false foals