Warning is a form of Warn. Threat is a type of Warning. Threat is a synonym of Terror. Terror is a type of Person. 
Screw is a type of Tighten. Screw is a synonym of Ball. Ball is related to Golf. Golf is related to Club. 
Warn <--FormOf-- Warning <--IsA-- Threat <--Synonym--> Terror --IsA--> Person 
Tighten <--IsA-- Screw <--Synonym--> Ball <--RelatedTo--> Golf <--RelatedTo--> Club 