The term 'thunderstruck feeling' is often used to describe a feeling of AWE or amazement. AWE is an emotion that is often experienced when one is confronted with something that is vast, powerful, and mysterious. It can be caused by natural phenomena such as thunderstorms, or by other events such as witnessing a great feat of strength or courage. The crossword solution for this term is AWE, which is a three-letter word that captures the feeling of being overwhelmed by something extraordinary.