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