Crack is a type of Drug. Crack is a type of Hit. Hit is the opposite of Stick. Stick can be used for Fuel. 
Strength is related to Physical. Physical is related to Slap. Slap is a synonym of Just. Just is a synonym of Only. 
Drug <--IsA-- Crack --IsA--> Hit <--Antonym--> Stick --UsedFor--> Fuel 
Strength <--RelatedTo--> Physical <--RelatedTo--> Slap <--Synonym--> Just <--Synonym--> Only 