Develop is a type of Play. Exit is a type of Play. 
Hurt is related to Harm. Harm is a synonym of Wrong. Wrong is related to Bad. Bad is the opposite of Sufficient. 
Develop --IsA--> Play <--IsA-- Exit 
Hurt <--RelatedTo--> Harm <--Synonym--> Wrong <--RelatedTo--> Bad <--Antonym--> Sufficient 