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.
cloacas cloaks clocks clacks clags clogs clicks cologs clucks colics claques colugos cloques cowlicks killocks gallicas calks collogues kilogauss colleagues colloquies gulags cleeks gloggs caulks kulaks calicos calques cliques galagos glucose
cloaca cloacae clack cloak clock