Answer
Fill the blanks with:
velocity,$\qquad$ acceleration
Work Step by Step
We defined velocity as the derivative of position.
If s $=s(t)$ is the position of an object at time $t$, then its velocity is given by the derivative
$v=\displaystyle \frac{ds}{dt}$.
So, position (=distance, if direction doesn't change) is an antiderivative of velocity.
We also defined $a=\displaystyle \frac{dv}{dt}$: acceleration is the derivative of velocity.
So, velocity is an antiderivative of acceleration.