Interesting definition because those two things aren't always the same. Which is one of the things that Jesus talked about a lot. Doing lots of religious things does not mean a person is God-fearing. Going to church every Sunday does not make one a Christian. I fear that too many people practice this sort of piety.
The piety that is a true reverence for God changes lives. And it makes us smarter. "The fear of the Lord is the beginning of wisdom." (Proverbs 9:10)