lawsuit(n = noun.act) case, causa, cause, suit - a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy; "the family brought suit against the landlord"
is a kind of legal proceeding, proceeding, proceedings
has particulars: civil suit, class-action suit, class action, countersuit, criminal suit, moot, bastardy proceeding, paternity suit

   An action at law; a suit in equity or admiralty; any legal proceeding before a court for the enforcement of a claim. [1913 Webster]

lawsuit, n. the process or an instance of making a claim in a lawcourt.

N  lawsuit, suit, action, cause, litigation, suit in law, dispute, citation, arraignment, prosecution, impeachment, accusation, presentment, true bill, indictment, apprehension, arrest, committal, imprisonment, writ, summons, subpoena, latitat, nisi prius, venire, venire facias pleadings, declaration, bill, claim, proces verbal, bill of right, information, corpus delicti, affidavit, state of facts, answer, reply, replication, plea, demurrer, rebutter, rejoinder, surrebutter, surrejoinder, suitor, party to a suit, plaintiff, defendant, litigant, hearing, trial, verdict, appeal, appeal motion, writ of error, certiorari, case, decision, precedent, decided case, reports (legal reference works, see reference books), litigious, qui tam, coram judice, sub judice, pendente lite, adhuc sub judice lis est, accedas ad curiam, transeat in exemplum.

N  accusation, charge, imputation, slur, inculpation, exprobration, delation, crimination, incrimination, accrimination, recrimination, tu quoque argument, invective, denunciation, denouncement, libel, challenge, citation, arraignment, impeachment, appeachment, indictment, bill of indictment, true bill, lawsuit, condemnation, gravamen of a charge, head and front of one's offending, argumentum ad hominem, scandal, scandalum magnatum, accuser, prosecutor, plaintiff, relator, informer, appellant, accused, defendant, prisoner, perpetrator, panel, respondent, litigant, accusing, accusatory, accusative, imputative, denunciatory, recriminatory, criminatory, accused, suspected, under suspicion, under a cloud, under surveillance, in custody, in detention, in the lockup, in the watch house, in the house of detention, accusable, imputable, indefensible, inexcusable, unpardonable, unjustifiable, vicious, Int, look at home, tu quoque, the breath of accusation kills an innocent name, thou can'st not say I did it.