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.
vetch fetch fitch vichy vouch fitchy fitchee fitchew vouchee
fetch vetch etch letch ketch retch wretch hootch teach datcha catch match catchy techy ratch hatch lech witch dutch gotcha teuch hitch natch notch patchy pech pitchy reach bitch heuch eche butch bitchy beech each botchy yech beechy sheuch echo litchi rotche tach rotch quitch itch reecho tech beach leach botch watch ditch fitch tetchy leech witchy fitchy mutch nautch patch peach pitch reechy cutch itchy hutch latch batch aitch hotch yechy