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.
brioche broche barouche broach brooch birch birrotch brach breech breach bearish boarish boorish brachia brash brush brashy brushy
brioche rotche rouche barouche broche farouche caroche soroche troche trochee