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.
shortie short shorty shored shrewdie shirt shred chored shirty shared shrewd sheroot sheared shirred sheered choroid choired chorioid choreoid chert sherd shard chart chord cherty shroud shaird chared chirred chaired charade churred chariot charity charred cheered cheroot tiaraed
shortie sortie retie aortae borate boride forte phorate norite orate diorite torte ort