Accusation is etymologically related to Accuse. Accuse is a synonym of Charge. 
you are likely to find Explosion in/at/on Universe. Explosion is related to Bomb. you are likely to find Bomb in/at/on Jet. 
Accusation --EtymologicallyRelatedTo--> Accuse <--Synonym--> Charge 
Universe <--AtLocation-- Explosion <--RelatedTo--> Bomb --AtLocation--> Jet 