Difference between Perfidy and Treachery

PERFIDY vs TREACHERY: NOUN

An act of deliberate betrayal
Deliberate breach of faith; calculated violation of trust; treachery.
The act or an instance of treachery.
Breach of faith or trust; base treachery; faithlessness.
Synonyms See perfidious.
The act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.
Specifically, in warfare, an illegitimate act of deception, such as using symbols like the Red Cross or white flag to gain proximity to an enemy for purposes of attack.
A state or act of deceit.
Betrayal of a trust

Betrayal of a trust
Willful betrayal of fidelity, confidence, or trust; perfidy.
The act or an instance of such betrayal.
Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy.
Synonyms See perfidious.
Deliberate, often calculated, disregard for trust or faith.
The act of violating the confidence of another, usually for personal gain.
Treason.
An act of deliberate betrayal

Malfeasance, Arrogance, Dishonesty, Venality, Deceit, Shamelessness, Cowardice, Hypocrisy, Duplicity, Mendacity, Disloyalty, Perfidiousness, Treason, Betrayal, Treachery

Sell out, Carve up, Hoax, Cheat, Cheating, Trickery, Infidelity, Traitor, Deception, Disloyalty, Deceit, Perfidiousness, Treason, Perfidy, Betrayal

Underhandedness, Barbarity, Complicity, Hubris, Knavery, Malfeasance, Arrogance, Dishonesty, Venality, Deceit, Cowardice, Duplicity, Mendacity, Betrayal, Treachery

Dishonesty, Wickedness, Cowardice, Duplicity, Sell out, Carve up, Hoax, Cheat, Trickery, Infidelity, Traitor, Deception, Deceit, Perfidy, Betrayal

Each, for the other, has been the embodiment of evil and perfidy.
Perfidy was considered a dishonour which could not be redeemed by any act, no matter how heroic.
Lies and perfidy are the refuge of fools and cowards.
Practice of perfidy also inhibits restoration of peace.
And more than that: Their perfidy ranks among the worst in all of human history.
Herr von Bethmann Hollweg, as being a proof of British hypocrisy and perfidy!
Israel does not recognize feigning protected status in order to captureas perfidy.
Tim will find more alleged perfidy to turn into cheap shots.
National Organizing Committees accused of perfidy is fair game.
Nevertheless, this concerns only the general prohibition of perfidy and the concept of perfidy.

Judas gave a kiss of betrayal and treachery.
Meanwhile treachery was at work without and within.
Dunbar for some time showed symptoms of treachery.
Alleged treachery of the Americans and other foreigners.
Go back and kill Weylon for his treachery.
So, if you live by treachery and abuse your power, you are likely to go down by treachery and abuse of power.
It was treachery towards Toussaint that caused the massacre of Santo Domingo; it was treachery towards Osceola that brought bloodhounds into Florida!
Treachery was a frozen landscape, ringed by the Classical and Biblical Giants who symbolized pride and other spiritual flaws lying behind acts of treachery.
Treachery was no less treachery though Grammont was dying.
Baskin Tre Treacherous Treachery of the Red Man Treachery on the High Seas Treachery Rides the Range Treachery Rides the Trail Treacle Jr.