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.
mucho much mouch macho mutch mach mush mache match miche mocha mooch mushy mash mesh mosh
gaucho mucho gauche louche macho much cachou mouch cutch nautch mutch pouchy rouche sauch douche dutch touch touchy sheuch ouch heuch couch nacho vouch chao echo butch ahchoo achoo chow hutch nucha pouch reecho ruche such duchy teuch touche chowchow yuch