Challenge is a synonym of Dispute. Dispute is related to Like. Like is related to Crush. 
Combat is part of War. War is a type of Collective. Collective is similar to Joint. 
Challenge <--Synonym--> Dispute <--RelatedTo--> Like <--RelatedTo--> Crush 
Combat --PartOf--> War --IsA--> Collective <--SimilarTo--> Joint 