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.
marka markka mark markkaa maraca margay marc merk mirk murk mirky murky marque marquee merc
marka charka parka ark darky hark sarky cark barca bark barky burka eureka arak quark lark nark narky sark larky dark mark tarok markka chark park wark shark
mar maar mair mara mare maria marrow marrowy marry