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.
crouch crutch crotch caroch grouch carroch grouchy caroche caroach crush curch grutch cratch creche currach carritch crash creesh qurush currish grushie kerchoo
crouch grouch troche soroche lurch grouchy crutch brioche curch broche rouche ruche barouche birrotch rotch crotch roach brooch farouche caroach caroch caroche carroch broach grutch porch torch church
cru crow ecru cougar roguery scour