Athleticness vs. Athleticism

Athleticness and Athleticism Definitions
Athleticness
(uncountable) The state or quality of being athletic.
Athleticism
Of or befitting athletics or athletes.
Athleticism
Characterized by or involving physical activity or exertion
An athletic lifestyle.
An athletic child.
Athleticism
Physically strong and well-developed; muscular
An actor with an athletic build.
Athleticism
The state of being an athlete, or of taking part in athletic events.
Athleticism
A show of athletic prowess.
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Athleticism
The practice of engaging in athletic games; athletism.
Athleticism
Intense energy;
His music is characterized by a happy athleticism