Requirement is related to Obligation. Obligation is related to Demand. Demand is related to Threat. Threat is a synonym of Terror. 
Flavor is a type of Kind. Kind is related to Good. 
Requirement <--RelatedTo--> Obligation <--RelatedTo--> Demand <--RelatedTo--> Threat <--Synonym--> Terror 
Flavor --IsA--> Kind <--RelatedTo--> Good 