Choose the most appropriate ANTONYM of the given word.

CONCILIATION

Confrontation 

The most appropriate antonym of the word conciliation is confrontation.

• Conciliation means "the process of making peace between people or groups who are in conflict."
• Confrontation means "a hostile or argumentative meeting or situation."

The other words do not have the same meaning as confrontation.

• Notional means "existing only in the mind; not real."
• Tactic means "a plan or method of achieving a particular goal."
• Observer means "a person who watches or observes something."