Whale is a type of Ship. Whale is related to Huge. Huge is related to Fortune. 
Terrible is a synonym of Severe. Severe is a synonym of Harsh. Harsh is the opposite of Soft. 
Ship <--IsA-- Whale <--RelatedTo--> Huge <--RelatedTo--> Fortune 
Terrible <--Synonym--> Severe <--Synonym--> Harsh <--Antonym--> Soft 