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.
cheat chat chaeta chatty chetah chit shat cheetah chaetae chad chateau chute chide shoat sheet chott chitty chuddah chid shad shed shit shot shut
wheat cheat heat hat eat het what ghaut seat ghat neat whet haet peat hate sheet phat haut beat peaty reata head teat meat beaut meaty chat shat feat shoat
chai chao chaw chay chew chewy chia chiao shea ache eche