Intense is similar to Deep. Deep is the opposite of High. High is a synonym of Violent. Violent is related to Attack. 
Could is etymologically related to Will. Will is a type of Decide. Regulate is a type of Decide. Regulate is a synonym of Govern. 
Intense <--SimilarTo--> Deep <--Antonym--> High <--Synonym--> Violent <--RelatedTo--> Attack 
Could --EtymologicallyRelatedTo--> Will --IsA--> Decide <--IsA-- Regulate <--Synonym--> Govern 