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.
piki pika pike paik pick picky piggie pic pig puke puck peck pack peke pica peek pock peak poke poky pawky peaky pecky pekoe piggy pique pocky pokey pucka pukka