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.
clutchy clutch cultch glitchy clach culch cliche cloche glitch klatch caleche caliche clash gulch calash coolish
clutchy blotchy clutch cultch glitchy slouchy