Stock is a synonym of Store. Store is related to Retailer. Retailer is derived from Retail. 
Kit is a type of Case. Case is related to Pack. Pack is a synonym of Crew. 
Stock <--Synonym--> Store <--RelatedTo--> Retailer --DerivedFrom--> Retail 
Kit --IsA--> Case <--RelatedTo--> Pack <--Synonym--> Crew 