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.
spick spic spik speck sepic spica spike spiky spikey spicae sapphic spec spake speak spoke spook spooky seppuku
spick pick pic shoepack epic tupik bipack spiky copeck spik spic puck spica speck sapphic kopeck biopic piki pock sepic pika picky pica peck paik pack gopik repack pike spike topic typic yapock