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.
much mouch mutch mucho mach mush mooch mocha miche match mache mushy macho mash mesh mosh mashy meshy
vouch heuch couch mouch much ouch pouch sauch such teuch touch sheuch yuch