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.
tupik topic typic tapioca
tupik paik pick pika pike piki gopik spick spik spike spiky
tup taupe tipi topi toupee stupa stupe