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.
shut shout shute shit shot shat shoat shoot shott chute shote sheet shitty shittah shad shod shed chat chit cheat chott shade shady shied shoed