Unity is the opposite of Division. Division is related to Divide. Divide is related to Tactic. 
Peace is related to Human. Human is related to Lung. Lung is related to Part. Part is related to Stomach. 
Unity <--Antonym--> Division <--RelatedTo--> Divide <--RelatedTo--> Tactic 
Peace <--RelatedTo--> Human <--RelatedTo--> Lung <--RelatedTo--> Part <--RelatedTo--> Stomach 