Argument is related to Fight. Fight is a synonym of Fighting. 
Accusation is a type of Charge. Charge is related to Use. Use is related to Pay. Pay is related to Purchase. 
Argument <--RelatedTo--> Fight <--Synonym--> Fighting 
Accusation --IsA--> Charge <--RelatedTo--> Use <--RelatedTo--> Pay <--RelatedTo--> Purchase 