drinking_water has definitions from the field of food
1
[ noun ] (food) water suitable for drinking

Used in print

(Ralph B. Long. The Sentence and Its Parts: A...)

In the second sentence if drinking water is a gerundial clause and without drinking water is roughly equivalent in meaning to unless I drink water , there will be stronger stress on water than on drinking ; but if drinking is a gerundial noun modifying water and without drinking_water is equivalent_to without water for drinking , there will be stronger stress on drinking than on water .

*