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.
figs fags vigs fogs fugs vigas fugus ficus fugues fiques ficoes fix vugs fakes fecks focus fucks fucus fykes vagus vuggs
bigs figs vigs gigs jigs migs pigs rigs cigs zigs digs whigs wigs