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.
yuck yucky yuk yack yeuk yock yuca yeuky yukky yak yok yoke yuga
buck fuck huck guck luck muck puck ruck suck duck tuck chuck shuck yuck