Strike is a type of Pitch. Butt is a type of Strike. Butt is a type of Victim. Killing requires Victim. 
Relief is a synonym of Comfort. Comfort is related to Sympathy. Sympathy is a type of Emotion. Emotion is a type of Feeling. 
Pitch <--IsA-- Strike <--IsA-- Butt --IsA--> Victim <--HasPrerequisite-- Killing 
Relief <--Synonym--> Comfort <--RelatedTo--> Sympathy --IsA--> Emotion --IsA--> Feeling 