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.
cony coney con coin cone coni conn coon coign canny goony gooney can gown koan kaon cain goon gone cane canna canoe gonia gunny koine quoin
bony phony cony goony loony mony moony peony pony tony on