excitation

(noun) the state of being emotionally aroused and worked up. Synonyms: excitement, inflammation, fervor, fervour. Examples: "His face was flushed with excitement and his hands trembled." "He tried to calm those who were in a state of extreme inflammation."

(noun) the neural or electrical arousal of an organ or muscle or gland. Synonyms: innervation, irritation.

(noun) something that agitates and arouses. Synonyms: excitement. Example: "He looked forward to the excitements of the day."