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.
orach orache orisha
brach currach orach reach preachy porch parch breach ratch birch earache arch rash carroch mariachi roach diarchy torchy church rich huarache brash merch crash huaracho search preach caroch perch caroach trash torch orache lurch march larch cratch broach curch churchy