Yell is related to Cut. Cut is the opposite of Heal. Heal is related to Recovery. 
Population is related to Large. Large is related to Battle. Battle is related to Confrontation. 
Yell <--RelatedTo--> Cut <--Antonym--> Heal <--RelatedTo--> Recovery 
Population <--RelatedTo--> Large <--RelatedTo--> Battle <--RelatedTo--> Confrontation 