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.
freaky freak forky phreak fork frag frock forego froggy farrago
creaky freaky drecky sarky narky larky croaky creak cracky jerky freak phreak break braky barky wreak rekey reeky perky darky shrieky
fare fear fere feuar fire fora foray fore frae fray free froe reaver