Research is a synonym of Search. Prospect is a type of Search. 
Heat is related to Meat. Game is a type of Meat. Game is related to Competitive. Competitive is the opposite of Cooperative. 
Research <--Synonym--> Search <--IsA-- Prospect 
Heat <--RelatedTo--> Meat <--IsA-- Game <--RelatedTo--> Competitive <--Antonym--> Cooperative 