Food is etymologically related to Foster. Food is related to Grass. Grass is related to Component. 
Nasty is related to War. War is related to Bloody. Bloody is related to Kill. 
Foster <--EtymologicallyRelatedTo-- Food <--RelatedTo--> Grass <--RelatedTo--> Component 
Nasty <--RelatedTo--> War <--RelatedTo--> Bloody <--RelatedTo--> Kill 