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.
mocha mooch mouch mach mosh much mache macho match miche mucho mutch mash mesh mush
mocha vouch datcha rotch pouch poach ouch nucha mouch hootch loch chaw chay chia boche botch chao chai mooch dacha roach pooch pacha nuchae notch lochia hooch loach gotcha couch cooch coach hotch touch