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.
mooch mocha mouch mach mosh much mache macho match miche mucho mutch mash mesh mush
hooch mooch pooch cooch mocha whoosh loch rotch couch pouch loach ouch notch mouch hotch boche poach coach hootch roach vouch touch botch woosh