Profit is related to Being. Being is related to Free. Free is the opposite of Control. Control is a synonym of Manipulate. 
Century is related to Era. Era is related to Age. Age is related to Demographic. 
Profit <--RelatedTo--> Being <--RelatedTo--> Free <--Antonym--> Control <--Synonym--> Manipulate 
Century <--RelatedTo--> Era <--RelatedTo--> Age <--RelatedTo--> Demographic 