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.
achy ache ashy achoo aitch ahchoo ash
achy itchy witchy tetchy duchy beechy bitchy botchy fitchy vichy beachy leachy catchy patchy peachy pitchy poachy pouchy reechy techy touchy yechy