Greatest is similar to Superior. Superior is similar to Capital. Capital is the opposite of Service. Service is related to Plate. 
Rough is a type of Sensation. Sensation is related to Shock. Shock is the opposite of Expected. Expected is the opposite of Unlikely. 
Greatest <--SimilarTo--> Superior <--SimilarTo--> Capital <--Antonym--> Service <--RelatedTo--> Plate 
Rough --IsA--> Sensation <--RelatedTo--> Shock <--Antonym--> Expected <--Antonym--> Unlikely 