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