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.
crotch caroch crouch crutch cratch caroach caroche carroch curch carritch grutch creche grouch currach grouchy crash crush creesh currish kerchoo
birrotch crotch rotch ratch torch retch porch roach grutch rotche crutch wretch broche cratch carroch brioche broach brooch caroach caroch caroche carritch crouch grouch parritch soroche troche