Build is the opposite of Decrease. Casualty is a type of Decrease. Casualty is a synonym of Emergency. Emergency is related to Reserve. 
Pitch is a type of Play. Strike is a type of Pitch. 
Build <--Antonym--> Decrease <--IsA-- Casualty <--Synonym--> Emergency <--RelatedTo--> Reserve 
Play <--IsA-- Pitch <--IsA-- Strike 