Hostage is related to Take. Take is related to Hide. Hide is related to Fur. Fur is related to Product. 
Extraordinary is the opposite of Common. Common is a different concept from Occasional. 
Hostage <--RelatedTo--> Take <--RelatedTo--> Hide <--RelatedTo--> Fur <--RelatedTo--> Product 
Extraordinary <--Antonym--> Common <--DistinctFrom--> Occasional 