Belong is related to Possession. Possession is related to Keep. Keep is the opposite of Kill. Kill is a synonym of Defeat. 
Reference is a synonym of Extension. Extension is a type of Telephone. Telephone is related to Bill. Bill is related to Pay. 
Belong <--RelatedTo--> Possession <--RelatedTo--> Keep <--Antonym--> Kill <--Synonym--> Defeat 
Reference <--Synonym--> Extension --IsA--> Telephone <--RelatedTo--> Bill <--RelatedTo--> Pay 