Swing is a type of Blow. Blow is etymologically related to Blue. 
Boss is related to Captain. Captain is a different concept from Major. Major is a type of Discipline. Discipline is related to Training. 
Swing --IsA--> Blow --EtymologicallyRelatedTo--> Blue 
Boss <--RelatedTo--> Captain <--DistinctFrom--> Major --IsA--> Discipline <--RelatedTo--> Training 