rival

Derived from the Latin ' rivalis', meaning 'one who competes for the same thing', from 'rivus' meaning 'stream'.

NOUN (1)

[/ˈraɪ.vəl/^en-US]

ライバル literal / 競争相手 literal / 敵対者 neutral / 競技者 neutral / 競争者 neutral

Synonyms competitor neutral , opponent neutral , contender neutral

Antonyms ally

A person, team, or entity that competes with another for the same objective, superiority, or for the same advantage.

plural
rivals

The two football teams have been fierce rivals for decades, always delivering exciting matches. — Two sports teams competing against each other.
Several tech companies are trying to outdo their main rivals in the market by developing innovative new products. — Companies competing in business.

VERB (1)

[/ˈraɪ.vəl/^en-US]

競い合う literal / 対抗する neutral / 競争する neutral / 競技する neutral / 対立する neutral

Synonyms compete neutral , contest neutral

Antonyms cooperate

To be as good as or better than someone or something else; to compete with or match someone or something.

past	present_participle
rivaled	rivaling

Few modern skyscrapers can rival the Empire State Building in iconic status and architectural grandeur. — To be comparable in quality or impact.
The local bakeries actively rival each other for the best bread recipe in town. — To compete directly.