Pistol is the opposite of Rifle. Rifle is related to Gun. Gun is related to Piece. Piece is related to Element. 
Set is a type of Placement. Set is a synonym of Intent. 
Pistol <--Antonym--> Rifle <--RelatedTo--> Gun <--RelatedTo--> Piece <--RelatedTo--> Element 
Placement <--IsA-- Set <--Synonym--> Intent 