Position is a synonym of Placement. Placement is related to Middle. Middle is related to Relative. 
Northwest is similar to Northeast. Northeast is the opposite of Southwest. Southwest is a type of Airline. Indian is a type of Airline. 
Position <--Synonym--> Placement <--RelatedTo--> Middle <--RelatedTo--> Relative 
Northwest <--SimilarTo--> Northeast <--Antonym--> Southwest --IsA--> Airline <--IsA-- Indian 