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.
shorty short shirty shortie shirt shored cherty sheroot charity chart sherd shard shred chert chord shrewd chored shared shaird shroud cheroot choroid choired sheered shirred chariot sheared choreoid chorioid shrewdie
borty forty shorty dorty ort fort ferrety court parroty korat port forte sort verity purty surety boart torot torta trouty whort wort cherty short carroty arty grouty purity mort bort grotty parity party rarity rooty dirty ferity aorta hearty tarty tort torte warty wordy charity shirty sorta
shore chore chorea share sharia shariah sherry shire shirr shoer shrew shri ashore