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