Peasant is the opposite of Royal. Royal is related to King. King is related to Realm. 
Register is a synonym of Depict. Depict is a synonym of Draw. Draw is related to Render. 
Peasant <--Antonym--> Royal <--RelatedTo--> King <--RelatedTo--> Realm 
Register <--Synonym--> Depict <--Synonym--> Draw <--RelatedTo--> Render 