Whale is related to Boat. Boat is related to Shape. 
Show is a synonym of Express. Express is related to Federal. Federal is similar to Northern. Northern is the opposite of Southern. 
Whale <--RelatedTo--> Boat <--RelatedTo--> Shape 
Show <--Synonym--> Express <--RelatedTo--> Federal <--SimilarTo--> Northern <--Antonym--> Southern 