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.
quirky quirk quark kirk corky cracky creaky crikey croaky crickey
quirky mirky irk narky shirk corky turkey mirk dorky larky darky quirk sarky kirk porky crikey forky jerky euroky bricky braky birk barky murky perky pricky darkey dirk tricky chirk shrieky
quire guiro quare quarry query quicker squire