Pocket is a synonym of Purse. you are likely to find Purse in/at/on Store. 
Ridiculous is the opposite of Serious. Serious is related to Concern. Concern is a synonym of Thing. 
Pocket <--Synonym--> Purse --AtLocation--> Store 
Ridiculous <--Antonym--> Serious <--RelatedTo--> Concern <--Synonym--> Thing 