Competition

n. rivalry, act of competing against another; contest

Competition is the rivalry of two or more parties over something. Competition occurs naturally between living organisms which coexist in an environment with limited resources. For example, animals compete over water supplies, food, and mates. In addition, humans compete for recognition, wealth and entertainment.
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Competition /com·pe·ti·tion/ the phenomenon in which two structurally similar molecules “compete” for a single binding site on a third molecule. [more]Competition - Community and Resources

Noun
1. a business relation in which two parties compete to gain customers; "business competition can be fiendish at times"
(hypernym) business relation
(hyponym) price war, price competition
2. an occasion on which a winner is selected from among two or more contestants
(synonym) contest
(hypernym) social event
(hyponym) game
3. the act of competing as for profit or a prize; "the teams were in fierce contention for first place"
(synonym) contention, rivalry
(antonym) cooperation
(hypernym) group action
(hyponym) contest
(derivation) compete, vie, contend
4. the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"
(synonym) rival, challenger, competitor, contender
(hypernym) contestant
(hyponym) champion, champ, title-holder

n. competition, concurrence, contest, tournament, discord