Bull is a synonym of Cop. Cop is a synonym of Policeman. 
Surgeon is related to Operation. Operation is related to Patient. Patient is a type of Person. Person wants (to) Dinner. 
Bull <--Synonym--> Cop <--Synonym--> Policeman 
Surgeon <--RelatedTo--> Operation <--RelatedTo--> Patient --IsA--> Person --Desires--> Dinner 