Terror

Terror is a pronounced state of fear, an overwhelming sense of imminent danger.

For the period of the French Revolution, see its more formal name, the Reign of Terror.
For campaigns of political terror during the Russian Revolution of 1917, see Red Terror and White Terror. A later campaign, sometimes referred to as the Great Terror, is discussed in the article Great Purge.
For historical and popular terms referring to violence (especially against civilians, whether prominent or not) that is insignificant in terms of military tactics but aimed at undermining morale, see terrorism.
For military doctrine, Shock and Awe.
For the USA's "War on Terror" (2001–present), see War on Terrorism.
Eight ships of the Royal Navy have been named HMS Terror.
For the Californian hardcore band, see Terror (band).
Two mountains have been named Mount Terror, one in Antarctica, and one in the USA.
For extreme style of techno music see terrorcore.