S: (n) motivation, motive, need (the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior) "we did not understand his motivation"; "he acted with the best of motives"
S: (n) event (something that happens at a given place and time)
S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) competition, contention, rivalry (the act of competing as for profit or a prize) "the teams were in fierce contention for first place"
S: (n) rival, challenger, competitor, competition, contender (the contestant you hope to defeat) "he had respect for his rivals"; "he wanted to know what the competition was doing"