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.
sheroot cheroot chert short shirt sherd shirty shroud cherty shorty sheered sheared chariot shred shard chart shaird shored shrewd shared charity cheered choroid shirred shortie
sheroot cheroot root rooty heriot pierrot rot
shear sheer sherry shier shoer usher