Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun treachery
2 senses of treachery
Sense 1
perfidy, perfidiousness, treachery -- (betrayal of a trust)
=> disloyalty -- (the quality of being disloyal)
Sense 2
treachery, betrayal, treason, perfidy -- (an act of deliberate betrayal)
=> dishonesty, knavery -- (lack of honesty; acts of lying or cheating or stealing)