Price is a synonym of Toll. Toll is related to Change. Change is related to Slope. Slope is related to Direction. 
Side is related to Window. Window is related to Sorry. 
Price <--Synonym--> Toll <--RelatedTo--> Change <--RelatedTo--> Slope <--RelatedTo--> Direction 
Side <--RelatedTo--> Window <--RelatedTo--> Sorry 