Site is related to Bank. Bank is related to Independent. Independent is the opposite of Colony. Colony is the opposite of Homeland. 
Purchase is a type of Acquisition. Acceptance is a type of Acquisition. Acceptance is a type of Draft. Draft is a type of Drink. 
Site <--RelatedTo--> Bank <--RelatedTo--> Independent <--Antonym--> Colony <--Antonym--> Homeland 
Purchase --IsA--> Acquisition <--IsA-- Acceptance --IsA--> Draft --IsA--> Drink 