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.
cowlicks colics clicks clucks klicks clacks clocks calicos killicks calicoes kliks calks cloaks cleeks caulks cologs colloquies cloacas kylikes colugos cliques killocks gallicas collogues calix clags clogs colleagues gleeks kolkoz kulaks
flicks slicks cowlicks clicks killicks rollicks klicks licks slacks locks calicos kliks lucks flocks flacks celiacs clacks lacks likes placks beylics flics blocks silicas pollacks shlocks maiolicas shellacks kylikes colics plucks clucks bullocks mullocks flecks pollocks hillocks clocks laics bollocks gallicas rowlocks relics beyliks blacks relocks killocks shylocks