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.
spike spikey spik spick spake spiky spoke spicae spic spec sepic speak speck spica spook spooky sapphic seppuku
spike pike spoke spikey spik spick spake mopoke gopik cowpoke puke poke piki pika pick peke paik spiky tupik