Surgery is related to Hospital. Hospital is related to Condition. Condition is related to Current. Current is the opposite of Still. 
Hell is a synonym of Devil. Devil is the opposite of Conscience. 
Surgery <--RelatedTo--> Hospital <--RelatedTo--> Condition <--RelatedTo--> Current <--Antonym--> Still 
Hell <--Synonym--> Devil <--Antonym--> Conscience 