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.
chirk chark shirk charka shark choric shriek shrike charqui choreic shrieky
shirk chirk irk birk hark kirk quirk quirky mirk mirky dirk chark shark
chiro chirr chirre chiru churr ochry chorea ochrea chore achier choir shire cherry chair chary char churro charry shirr charro ochre charr ochreae chare chichier