Broad is the opposite of Short. Short is related to Crop. Crop is related to Supply. 
Momentum is related to Mass. Mass is related to River. Lay is a type of River. Lay is related to Chip. 
Broad <--Antonym--> Short <--RelatedTo--> Crop <--RelatedTo--> Supply 
Momentum <--RelatedTo--> Mass <--RelatedTo--> River <--IsA-- Lay <--RelatedTo--> Chip 