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.
creesh crash crush creche currish queerish qursh gursh curch cratch crouch crutch crotch caroch garish qurush caroach caroche carroch currach grushie carritch
care core crew cure gree acre ocrea ocreae reeker reekier scree screw screwy cheekier