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.
clutch clutchy cultch clach culch cliche cloche glitch klatch caleche caliche glitchy clash gulch calash coolish
clutch latch slouch mulch letch litchi louche blotch blotchy fletch flitch clutchy culch cultch glitch glitchy gulch klatch slatch slouchy