Independent is the opposite of Dependent. Dependent is the opposite of Absolute. Absolute is the opposite of Relative. Relative is related to Brother. 
Concert is a type of Settle. Settle is related to Pay. 
Independent <--Antonym--> Dependent <--Antonym--> Absolute <--Antonym--> Relative <--RelatedTo--> Brother 
Concert --IsA--> Settle <--RelatedTo--> Pay 