Variable is related to Crop. Crop is related to Value. Value is related to Quantity. 
Thought is related to Opinion. Opinion is a synonym of View. View is related to Overlook. 
Variable <--RelatedTo--> Crop <--RelatedTo--> Value <--RelatedTo--> Quantity 
Thought <--RelatedTo--> Opinion <--Synonym--> View <--RelatedTo--> Overlook 