Accuse is etymologically related to Cause. Accuse is a type of Charge. Overwhelm is a type of Charge. 
Affair is related to Outside. Outside is related to Crowd. Crowd is related to Mess. 
Cause <--EtymologicallyRelatedTo-- Accuse --IsA--> Charge <--IsA-- Overwhelm 
Affair <--RelatedTo--> Outside <--RelatedTo--> Crowd <--RelatedTo--> Mess 