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.
cleeks gleeks calks cloaks clocks clucks clicks clacks caulks colleagues cliques calques claques cloques cowlicks calicoes kliks clags culex clogs collogues colics colloquies cologs klicks kulaks calicos cloacas colugos kylikes killicks killocks
leeks belleeks cleeks gleeks sleeks leaks leks bleaks elks flecks whelks yelks