Bomb can be used for Terror. Bomb can be used for Terrorism. Terrorism would make you want to Hide. 
National is related to Country. you are likely to find Pit in/at/on Country. Pit is a type of Area. Area is related to Wound. 
Terror <--UsedFor-- Bomb --UsedFor--> Terrorism --CausesDesire--> Hide 
National <--RelatedTo--> Country <--AtLocation-- Pit --IsA--> Area <--RelatedTo--> Wound 