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.
peak peaky pack paik peag peck peek peke pekoe pawky pecky pec peg pac piki puke pika pica pick poky pike puck pock poke paca picky pique pocky pokey pucka pukka
beak leak peak wreak teak weak