Antsiness vs. Antsy: What's the Difference?

Antsiness and Antsy Definitions
Antsiness
The state or quality of being antsy
Antsy
Restless or impatient; fidgety
The long wait made the children antsy.
Antsy
Nervous; apprehensive
"Camps got shot up all the time, but if there wasn't a shoot-up, they'd get antsy" (Harper's).
Antsy
(slang) restless, apprehensive and fidgety