Railroad is derived from Road. Road is related to Travel. Automobile is a type of Travel. Automobile is related to Drive. 
Receive is a synonym of Invite. Challenge is a type of Invite. Challenge is a synonym of Claim. Contend is a type of Claim. 
Railroad --DerivedFrom--> Road <--RelatedTo--> Travel <--IsA-- Automobile <--RelatedTo--> Drive 
Receive <--Synonym--> Invite <--IsA-- Challenge <--Synonym--> Claim <--IsA-- Contend 