Exponentiation is a mathematical operation, written as $b^n$, involving two numbers, the base b and the exponent or power n, and pronounced as "b raised to the power of n".
So when I have an equation like $x=3$ and transform it to $x^c=3^c$ I would also call it "Exponentation" or raising both sides of the equation to the power of c.
But what if in contrast I transform $x=3$ to $c^x=c^3$ would that still be called "Exponentation" and if so how would I describe it in words? Raising $c$ by both sides of an equation?