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.
zeks seeks zouks zooks zaikais zigs segs skis skas secs suks zags sacks soaks skews skies skees socks sokes sicks sykes sakes souks sakis skuas segos sikes sucks sooks sikas
geeks keeks leeks leks peeks reeks seeks zeks weeks cheeks