Exam is related to Examination. Examination is a synonym of Testing. 
Protest is related to Cause. Cause is related to Affect. Affect is a synonym of Improve. Improve is a synonym of Enhance. 
Exam <--RelatedTo--> Examination <--Synonym--> Testing 
Protest <--RelatedTo--> Cause <--RelatedTo--> Affect <--Synonym--> Improve <--Synonym--> Enhance 