Fortune is related to Rich. Rich is related to Value. Value is a synonym of Advantage. 
Rain is related to Like. Only is etymologically related to Like. Only is a synonym of Alone. 
Fortune <--RelatedTo--> Rich <--RelatedTo--> Value <--Synonym--> Advantage 
Rain <--RelatedTo--> Like <--EtymologicallyRelatedTo-- Only <--Synonym--> Alone 