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.
shlock shlocky shylock shellack shellac chalk chalky sialic
block relock pollock flock rowlock mullock shylock shlock hillock lock killock clock bullock shellack relook lick klick fleck killick cluck bullocky loco mullocky lack clack slick luck cloak shlocky cowlick look pluck black floc flick pollack loca click blocky talcky alack flocky bloke plack rollick slack bloc hillocky flack
shale shily scholia shyly shul shool shoaly shoal shill shaley sheol shelly shell shaly shallow shall school