Dig is a synonym of Labor. you are likely to find Labor in/at/on Work. Work is a synonym of Shape. Hill is a type of Shape. 
Local is the opposite of Global. Global is the opposite of National. National is related to Country. Country is related to Road. 
Dig <--Synonym--> Labor --AtLocation--> Work <--Synonym--> Shape <--IsA-- Hill 
Local <--Antonym--> Global <--Antonym--> National <--RelatedTo--> Country <--RelatedTo--> Road 