adrenaline

An adrenaline rush is that sudden feeling of excitement and energy when we experience something thrilling or scary.

Think about times when you've done something daring, like skydiving or public speaking. You might have felt a surge of adrenaline as your heart beats faster and you feel more alert. This word often refers to a physical response in people, but it can also be used to describe the excitement itself - for example, "The concert was full of adrenaline!" Here, adrenaline isn't just describing a feeling in someone's body; it's describing the atmosphere or energy of the event.