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.
polkas palookas pollacks pollocks placks plucks poleax plagues plaques poleaxe plugs pillowcase pollex pulques
polkas lacs lilacs kliks calks clags leks algas hulks baulks balks belgas taluks talookas walks sulks chalks silks yelks palookas lags bulks folks kulaks gulags ilks caulks halakahs folksy holks flags elks bilks talukas talks tilaks slags whelks beyliks shellacs milks yolks
polka pollack pollock apolog apologue