rivalry

Etymology

rival + -ry

noun

1. An ongoing relationship between (usually two) rivals who compete for superiority.
   The Boston Bruins have a longstanding rivalry with the Montreal Canadiens.
   James and Polly have a bitter rivalry due to the latter's inclusion in the Tea Time Teaser.
2. (economics) The characteristic of being a rivalrous good, such that it can be consumed or used by only one person at a time.
   2013-12-02 (last accessed), Department of Economics, University of Pittsburgh, at Johnstown, “Public Goods”, in (Please provide the book title or journal name), archived from the original on 2015-05-05:
   Common goods are those which are rivalrous in consumption but non-excludable
3. Any competition between two or more things or factors.
   Binocular rivalry is a visual phenomenon in which perception alternates between different images presented to each eye.