The distance between any two point placed apart from each other is called-

Answer 1

"distance"
However
If it is given as a vector with both magnitude
and direction it is "Displacement" and the
distance is the magnitude of the displacement
vector.

It is 4.2 miles from here to city hall (distance)
It is 4.2 miles SOUTH from here to city hall (displacement)

To measure the speed you need a speedometer.
To measure the velocity vector you need both a
speedometer and a compass.