Diplomatic is related to Ally. Ally is the opposite of Opposition. Opposition is a synonym of Confrontation. Confrontation is derived from Confront. 
Pro is related to Master. Master is related to Male. Male is a type of Sex. 
Diplomatic <--RelatedTo--> Ally <--Antonym--> Opposition <--Synonym--> Confrontation --DerivedFrom--> Confront 
Pro <--RelatedTo--> Master <--RelatedTo--> Male --IsA--> Sex 