Rivalry

In Greek mythology, Zelus or Zelos (; ) was the daimon that personifies dedication, emulation, eager rivalry, envy, jealousy, and zeal. The English word "zeal" is derived from his name.

rivalry between PewDiePie and T-Series, owners of the most-subscribed YouTube channels

thumb|Tweedledum and Tweedledee, fictional rivals from [[Lewis Carroll's Through the Looking-Glass.]] A rivalry is the state of two people or groups engaging in a lasting competitive relationship. Rivalry is the "against each other" spirit between two competing sides. The relationship itself may also be called "a rivalry", and each participant or side a rival to the other. Someone's main rival may be called an archrival. A rivalry can be defined as "a perceptual categorizing process in which actors identify which states are threatening competitors". In order for the rivalry to persist, rather

thumb|right|Sherlock Holmes wrestling against his archenemy Professor James Moriarty.

idea of unavoidably hostile relations and mutual revanchism between Germans and French people

cooperation and rivalry between Austria and Prussia up to 1866

in economics, a phenomenon in which the consumption of some goods prevents their simultaneous consumption by other consumers, occurring for most tangible goods and some nontangible goods (e.g. Internet domains), but not for others (e.g. TV broadcast)

territorial and military conflicts between the House of Habsburg and France

type of competition or animosity among siblings