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