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.
calks caulks cleeks clacks clucks clicks clocks cloaks calx calques calicos cowlicks calicoes calyx calix clogs kliks clags colics kulaks klicks gleeks cologs cloacas cloques cliques galagos colugos claques kylikes gallicas killicks killocks collogues
balks talks calks chalks walks baulks lacks talcs slakes silks polkas beyliks flacks kliks folksy bilks leaks leks taluks milks lakes yelks lakhs tilaks clacks hulks kulaks cloaks blacks elks sulks slacks bulks pollacks flakes folks placks caulks bleaks ilks holks whelks shellacks yolks