1. treason, high treason, lese majesty, crime, offense, criminal offense, criminal offence, offence, law-breaking

usage: a crime that undermines the offender's government

2. treason, subversiveness, traitorousness, disloyalty

usage: disloyalty by virtue of subversive behavior

3. treachery, betrayal, treason, perfidy, dishonesty, knavery

usage: an act of deliberate betrayal

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See also: treason (Dictionary)