Interesting factoid, the two words mean the same thing! In old English, to "worry" someone meant to tear at them like a dog shaking its prey. The term "worried" came from feeling like you had been mauled because you were anxious. A warrior (spelled differently because there was no fixed spelling back then) was someone who could "worry" or maul an enemy. The verb of warrior is to worry. Which means you can be both a warrior and a worrier at the same time!...not that you should of course.