ri·val·ry /ˈraɪvəlrɪ/ 名詞
Ri·val·ry n.; pl. Rivalries The act of rivaling, or the state of being a rival; a competition. “Keen contention and eager rivalries.”
Syn: -- Emulation; competition. See Emulation.
n : the act of competing as for profit or a prize; "the teams
were in fierce contention for first place" [syn: competition,
contention] [ant: cooperation]