Road is a different concept from Highway. Highway is the opposite of Low. Low is a synonym of Depression. Depression is related to Medication. 
Exam is related to Admission. Admission is related to Price. Price is related to Sales. 
Road <--DistinctFrom--> Highway <--Antonym--> Low <--Synonym--> Depression <--RelatedTo--> Medication 
Exam <--RelatedTo--> Admission <--RelatedTo--> Price <--RelatedTo--> Sales 