[例]  They Board approved the new plan.

[同义词]  accept

approval  (n.) agreement批准

aptitude (n.) natural ability (to do a task)天资

[例] She had a high aptitude for business.

arbitrage (n.) the purchase of securities on one market for immediate resale on another market in order to profit from a price discrepancy套利

[例]  He made big fortune by arbitrage.

arbitration (n.) process of settling a dispute仲裁

[例] We shall have to resort to arbitration.

[同义词]  judgement, adjudication