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.
shoddy shod shady shoed shooed shadowy shot shed shad shied shott shoot shoat shade shote shout shadow shitty chuddah
noddy soddy shoddy toddy odd woody waddy boody muddy hoody faddy neddy eddy buddy caddy daddy doody duddy toady body ruddy biddy rowdy howdy kiddy midday fuddy baddy didy moody dowdy goody teddy today giddy paddy tody widdy cuddy middy