Textbook can be used for Learning. Puzzle can be used for Learning. you are likely to find Piece in/at/on Puzzle. Piece is related to Watch. 
Offense is the opposite of Defense. Defensive is derived from Defense. 
Textbook --UsedFor--> Learning <--UsedFor-- Puzzle <--AtLocation-- Piece <--RelatedTo--> Watch 
Offense <--Antonym--> Defense <--DerivedFrom-- Defensive 