Overwhelm is a type of Charge. Charge is related to Electronics. Electronics is a type of Physics. Physics is related to Force. 
Custom is related to Standard. Norm is a type of Standard. Grant is a type of Norm. Grant is a synonym of Concede. 
Overwhelm --IsA--> Charge <--RelatedTo--> Electronics --IsA--> Physics <--RelatedTo--> Force 
Custom <--RelatedTo--> Standard <--IsA-- Norm <--IsA-- Grant <--Synonym--> Concede 