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.
reecho reechy reach retch reshow wretch reshoe rechew resh rich ratch roach rotch ruche rotche rouche rushee
echo reecho eche etch fetch vetch heuch cachou each leech leach macho beechy retch teach techy chowchow yech gaucho nacho chao reach ahchoo achoo chow ketch lech letch beach peach mucho beech pech reechy wretch tech teuch sheuch yechy
ree bree free gree pree dree tree