Arena can be used for Competition. Competition is a type of Conflict. Conflict is a synonym of Battle. Battle is related to Single. 
Accurate is a synonym of Sharp. Sharp is similar to Intense. Intensity is derived from Intense. Intensity is a synonym of Strength. 
Arena --UsedFor--> Competition --IsA--> Conflict <--Synonym--> Battle <--RelatedTo--> Single 
Accurate <--Synonym--> Sharp <--SimilarTo--> Intense <--DerivedFrom-- Intensity <--Synonym--> Strength 