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.
caulks calks cleeks clacks clucks clicks kulaks cloaks clocks claques calques calicos calx calicoes cowlicks culex clags clogs calyx calix kliks colleagues colics gleeks cologs klicks gulags cliques cloques colugos cloacas galagos kylikes gallicas glaucous killicks killocks
bulks sulks hulks baulks caulks yelks whelks kliks tilaks milks talukas lucks leks salukis beyliks plucks bilks folksy walks balks folks chalks silks holks polkas kulaks flukes ilks talks elks taluks clucks calks yolks
caulk calico calk calque sculk