Battle is related to Event. Event is related to Date. Date is related to Like. Like is related to Reward. 
Diamond is related to Hard. Hard is a synonym of Strict. Strict is etymologically related to Strain. Tension is a type of Strain. 
Battle <--RelatedTo--> Event <--RelatedTo--> Date <--RelatedTo--> Like <--RelatedTo--> Reward 
Diamond <--RelatedTo--> Hard <--Synonym--> Strict --EtymologicallyRelatedTo--> Strain <--IsA-- Tension 