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.
klatch clach clutch cultch glitch clutchy glitchy clash culch gulch calash cliche cloche caleche caliche goulash
latch klatch slatch clutch letch pleach glitch loach glitchy cultch leach leachy litchi clach bleach laich blotch blotchy fletch flitch halacha clutchy