action at law,
legal action,
action a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong
trial (law) the determination of a person's innocence or guilt by due process of law; "he had a fair trial and the jury found him guilty"; "most of these complaints are settled before they go to trial"
jurisprudence,
law the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do
prosecution -
the lawyers acting for the state to put the case against the defendant