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.
yock yok yack yoke yuck yucky yak yuk yeuk yoga yuca yeuky yukky
bock hock jock cock lock mock knock nock pock rock sock dock chock shock yock