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.
marques marquees marquess marquis marquise morgues marcs marks markas margays markkas maracas mercs merks mirex mirks murex murks myricas
barques marques cirques torques roques argues baroques marquees marquess marquis morgues periques perukes piroques reargues charquis