Cookie is related to Round. Round is related to Balloon. 
Strain is related to Stress. Stress is a synonym of Accent. Accent is a synonym of Emphasis. Emphasis is related to Portray. 
Cookie <--RelatedTo--> Round <--RelatedTo--> Balloon 
Strain <--RelatedTo--> Stress <--Synonym--> Accent <--Synonym--> Emphasis <--RelatedTo--> Portray 