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Titan /ˈtʌɪt(ə)n/ noun A person or thing of very great strength, intellect, or importance. "a titan of industry"

Training Ground / (ˈtreɪnɪŋ ɡraʊnd) NOUN 1. sport an area where people prepare for sporting competitions,

with activities primarily concentrating on skills and fitness.

2. military an area where military personnel are trained for combat.

(In British English from the Collins Dictionary).