A Landing Zone or "LZ" is a military term for any area where an aircraft can land.
In the United States military, a landing zone is the actual point where aircraft land (equivalent to the commonwealth landing point.)
In commonwealth militaries, a "landing zone" is the cartographic (numeric) zone in which the landing is going to take place (e.g., a valley). The actual "landing area" is the area in which the landing is going to take place (e.g., the field where the aircraft are to land). The "landing point" is the actual point on which aircraft are going to land (e.g., a point of the field). Each aircraft has a different landing point.