Beef is a different concept from Pork. Pork is a type of Meat. Meat is the opposite of Vegetable. 
Upset is a synonym of Anger. Steam is a type of Anger. 
Beef <--DistinctFrom--> Pork --IsA--> Meat <--Antonym--> Vegetable 
Upset <--Synonym--> Anger <--IsA-- Steam 