Discovery is related to Found. Found is a synonym of Establish. Introduce is a type of Establish. Introduce is the opposite of Conclusion. 
Pay is a type of Payment. Payment is related to Fare. Fare is a type of Charge. Charge is a synonym of Load. 
Discovery <--RelatedTo--> Found <--Synonym--> Establish <--IsA-- Introduce <--Antonym--> Conclusion 
Pay --IsA--> Payment <--RelatedTo--> Fare --IsA--> Charge <--Synonym--> Load 