Chest is a synonym of Case. Case is related to Second. Second is related to Junior. Junior is related to Kid. 
Flash is related to Card. Card is related to Chance. Chance is related to Lucky. 
Chest <--Synonym--> Case <--RelatedTo--> Second <--RelatedTo--> Junior <--RelatedTo--> Kid 
Flash <--RelatedTo--> Card <--RelatedTo--> Chance <--RelatedTo--> Lucky 