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.
killock killick clock klick kolacky klik cluck cloak click clack kulak cloaca gallic cloacae colicky cowlick gallica
bullock pollock hillock killock mullock lock block shlocky blocky shellack bullocky rollick clock relock hillocky pollack flock flocky rowlock killick shlock mullocky shylock