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.
pollacks pollocks placks plucks polkas poleax pollex pillowcase plagues plaques poleaxe palookas plugs
lacks shellacks flacks placks pollacks blacks clacks slacks lacs bullocks klicks flicks killocks blocks killicks flakes clucks plucks pollocks lakhs flocks leaks rowlocks cloaks licks shlocks hillocks mullocks lakes clicks celiacs bleaks relocks flecks lucks locks cowlicks slakes slicks lilacs clocks bollocks rollicks kulaks laics shellacs tilaks shylocks