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.
marque marquee morgue marc mark marka maraca margay markka markkaa
barque marque cirque torque roque argue baroque marquee morgue perique peruke piroque reargue charqui
mar maar mair mara mare maria marrow marrowy marry