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.
celiacs slacks slicks selkies silicas cylix slags salukis
celiacs lacs shellacks slacks flicks lilacs killicks gallicas cowlicks colics clicks clacks calicos flics lacks placks blacks beylics licks laics klicks maiolicas pollacks rollicks flacks relics silicas slicks shellacs