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.
study stud studio steady studdie sited staid stout stied stade stood sated stead steed sauted sueded seated stadia statue sotted sooted setout suited satiety sauteed situate stat stet stot
study duddy tidy tody etude quietude stud tutued