Gap is a synonym of Pass. Pass is related to Driving. 
Arm is related to Shirt. Shirt is part of Outfit. Outfit is a synonym of Equip. Stock is a type of Equip. 
Gap <--Synonym--> Pass <--RelatedTo--> Driving 
Arm <--RelatedTo--> Shirt --PartOf--> Outfit <--Synonym--> Equip <--IsA-- Stock 