Hijacking on the high seas or in similar contexts; taking a ship or plane away from the control of those who are legally entitled to it:
— Air piracy.

synonym: buccaneering.

Roget 773: nonobservance etc. 772; evasion, inobservance, failure, omission, neglect, laches [Law], laxity, informality.    infringement, infraction; violation, transgression; piracy.    retraction, retractation^†, repudiation, nullification; protest; forfeiture.    lawlessness; disobedience etc. 742; bad faith etc. 940.    ... show more

Roget 791: stealing etc. v.; theft, thievery, latrociny^†, direption^†; abstraction, appropriation; plagiary, plagiarism; autoplagiarism^†; latrocinium^†.    spoliation, plunder, pillage; sack, sackage^†; rapine, brigandage, foray, razzia^†, rape, depredation, raid; blackmail.    piracy, privateering, buccaneering; license to plunder, letters of marque, letters of mark and reprisal.    filibustering, filibusterism^†; burglary; housebreaking; badger game [Slang].    robbery, highway robbery, hold-up [U.S.], mugging.    peculation, embezzlement; fraud etc. 545; larceny, petty larceny, grand larceny, shoplifting.    thievishness, rapacity, kleptomania, Alsatia^†, den of Cacus, den of thieves.    blackmail, extortion, shakedown, Black Hand [U.S.].    [person who commits theft] thief etc. 792.    ... show more

Dutch: zeeroverij
Polish: piractwo

The act of plagiarizing; taking someone's words or ideas as if they were your own.

synonyms: plagiarisation, plagiarism, plagiarization.

Dutch: letterdieverij, letterroof, plagiaat
Polish: plagiat