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.
clach clash culch clutch cultch klatch cloche cliche calash clutchy caliche caleche gulch glitch coolish glitchy goulash guilloche
clach lash zilch slash plash moloch klatch goulash culch loch latch leach leachy lech lich loach laich lych belch bleach filch flash halacha calash clash cultch gulch milch mulch pleach slatch welch
claw clay cola cackle caecal caecally laical laically