Kill is a synonym of Top. Top is related to Power. Power is related to Might. 
Save is a type of Keep. Save is a synonym of Spare. Spare is a type of Use. Use is a synonym of Treatment. 
Kill <--Synonym--> Top <--RelatedTo--> Power <--RelatedTo--> Might 
Keep <--IsA-- Save <--Synonym--> Spare --IsA--> Use <--Synonym--> Treatment 