Weapon is related to Rifle. 
Confusion is related to Understanding. Understanding is related to Agree. Agree is related to Consent. Consensus is etymologically related to Consent. 
Weapon <--RelatedTo--> Rifle 
Confusion <--RelatedTo--> Understanding <--RelatedTo--> Agree <--RelatedTo--> Consent <--EtymologicallyRelatedTo-- Consensus 