Slept late or woke early

Is it possible to be all tapped out with respect to words to write? Can it happen that if a person writes so much they will eventually reach a point where they have no words left? What would then happen, would they need to find a word replenishing activity, consumable or event that would fill them up with words to start anew?

So far I have not yet tapped out. I question whether or not I will ever.