Rough is a synonym of Harsh. Harsh is related to Punishment. Punishment is related to Penalty. 
Overlook is a type of Book. Chamber is a type of Book. Chamber is a type of House. Sky is etymologically related to House. 
Rough <--Synonym--> Harsh <--RelatedTo--> Punishment <--RelatedTo--> Penalty 
Overlook --IsA--> Book <--IsA-- Chamber --IsA--> House <--EtymologicallyRelatedTo-- Sky 