Fantastic is a synonym of Wild. Wild is a synonym of Violent. Killing can be used for Violent. 
System can be used for Efficiency. Accounting is a type of System. Accounting is a type of Explanation. Basis is part of Explanation. 
Fantastic <--Synonym--> Wild <--Synonym--> Violent <--UsedFor-- Killing 
Efficiency <--UsedFor-- System <--IsA-- Accounting --IsA--> Explanation <--PartOf-- Basis 