Peacekeeping
Part of speech: noun
Definition: An effort to preserve of peace between hostile groups, especially by a sanctioned military force.
Example sentence: As I prepare for my second term as Secretary-General, I am thinking hard about how we can meet the expectations of the millions of people who see the U.N.'s blue flag as a banner of hope. We have to continue our life-saving work in peacekeeping, human rights, development and humanitarian relief.
Operation
Part of speech: noun
Definition: The method by which a device performs its function.The method or practice by which actions are done.A planned undertaking.A business or organization.a surgical procedure.a procedure for generating a value from one or more other values (the operands; the value for any particular operands is unique)a military campaign (w:Operation Desert Storm)
Example sentence: Skill is the unified force of experience, intellect and passion in their operation.