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.
carritch carroch caroch cratch crotch crutch currach currish caroach caroche curch creche crouch garish grutch crash crush creesh grouch
carritch parritch rich ratch retch rotch wretch birrotch cratch crotch crutch grutch dreich
carr carry corrie currie acari scarry car