Cocaine is related to Blow. Blow is related to Boom. Boom is the opposite of Recession. Recession is a synonym of Withdrawal. 
Expensive is related to Price. Price is related to Code. Code is related to Rule. 
Cocaine <--RelatedTo--> Blow <--RelatedTo--> Boom <--Antonym--> Recession <--Synonym--> Withdrawal 
Expensive <--RelatedTo--> Price <--RelatedTo--> Code <--RelatedTo--> Rule 