"Calm" and "excite" are opposites, with calm representing a state of tranquility or lack of agitation, while excite indicates an increase in energy or agitation.

"Exodus" refers to a mass departure or exit of people, often used to describe a large group leaving a place. The antonym, "Homecoming," signifies a return or arrival back to one's home or place of origin. Therefore, "Homecoming" is the opposite of "Exodus" as it involves people coming back home rather than leaving.

"Reduction" involves the act of making something smaller or less in size, quantity, or degree. On the other hand, "promotion" typically refers to the act of increasing or advancing something, such as promoting a cause or moving to a higher rank or position. In short, reduction involves decreasing, while promotion involves increasing or advancing.