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.
felsite falsity fellest felicity fliest foulest fullest falsetto vealiest velocity villosity vilest volost fleeced violist
wellsite felsite falsity hillside calcite palsied poolside pulsate celeste
falsie feels fellies fells fuels