What's the difference between nugation and nugatory?

Nugation

Definition:

• (n.) The act or practice of trifling.

Example Sentences:

Nugatory

Definition:

• (a.) Trifling; vain; futile; insignificant.
• (a.) Of no force; inoperative; ineffectual.

Example Sentences:

• (1) The third facet of the problem is concern that Draghi’s intervention will be too little, too late, and that Europe is condemned to years of nugatory growth.