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.
chat cheat chaeta chatty shat chit chad chaetae chateau shoat chott chute chetah chitty chuddah cheetah chid shad shit shot shut chide shade shady sheet shoot shote shott shout shute
ghat phat hat what chat shat at