Threaten is a type of Warn. Threaten is derived from Threat. Threat is related to Enemy. Enemy is related to Military. 
Loop is a synonym of Circle. Circle is a synonym of Set. Set is related to Stone. 
Warn <--IsA-- Threaten --DerivedFrom--> Threat <--RelatedTo--> Enemy <--RelatedTo--> Military 
Loop <--Synonym--> Circle <--Synonym--> Set <--RelatedTo--> Stone 