Intense is similar to Violent. Violent is related to Attack. Attack is the opposite of Defend. Defend is a type of Argue. 
Similar is related to Nation. Nation is related to Republic. 
Intense <--SimilarTo--> Violent <--RelatedTo--> Attack <--Antonym--> Defend --IsA--> Argue 
Similar <--RelatedTo--> Nation <--RelatedTo--> Republic 