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.
chippy choppy chip chippie chuppa chappie chuppah ship chop chap chape cheap cheep cheapo shoppe chapeau cheapie
hippy quippy lippy whippy nippy chippy tippy zippy dippy peppy sappy zappy choppy guppy poppy quippu hoppy loppy happy pappy nappy puppy soppy hippo pipy buppy cuppy gappy yuppy