Nice quiz, but could you accept the medallions and pendants without having type in medallion or pendant along with the name? Also consider accepting potion instead of medicine, since at least the red medicine is explicitly called the red potion at one point in the game.
Please accept the following: sword; sword x4; shield; magic shield; green mail/jerkin. Also, crystals aren't pendants, but I don't know how else to categorize them without giving away the answer. You also didn't include the super bomb or the silver arrows--both are significantly different than their general counterparts.