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.
still stilly stull stile stall stella sootily steel stela stale stele style steal sidle stole styli sotol stool setal stelae seidel sedile stelai settle steely cedilla sedilia seedily steelie stoolie
till still til taille knottily nautili tail dilly dill cattail tell goutily rattail retell outtell rutile cedilla stall meatily tile stull dottily tattily wittily caudillo toil motile cattily doughtily tuille stilly tall coattail atoll fattily futile haughtily detail toll utile latilla nattily nuttily pettily retail retile ruttily sootily stile chattily