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.
charity chariot chart cherty chard chert shorty shirty chared charade charred choroid chaired cheroot choreoid chorioid short shirt shard chord shaird shared chored cheered chirred choired churred sheared sheroot shortie
parity rarity charity arty warty tarty purity party lariat hearty verity variety fruity ferity barite chariot gritty art
char chair chare charr charro charry chary sharia shariah