Synonyms of treason

treason

noun

ˈtrē-zᵊn 

as in treachery

the act or fact of violating the trust or confidence of another

reading a friend's diary without permission would have to be regarded as the ultimate act of personal treason

Synonyms & Similar Words

• treachery
• betrayal
• disloyalty
• deception
• perfidy
• infidelity
• deceit
• faithlessness
• lying
• backstabbing
• sellout
• abandonment
• unfaithfulness
• desertion
• falseness
• double cross
• falsity
• business
• two-timing
• duplicity
• double-dealing
• fraud
• informing
• trickery
• guile
• two-facedness
• snitching
• talebearing

Antonyms & Near Antonyms

• loyalty
• allegiance
• fidelity
• devotion
• fealty
• faithfulness
• steadfastness
• reliability
• defense
• staunchness
• protection
• trustworthiness
• dependability
• shield
• safeguard

Example Sentences

Recent Examples of treason

The Culture Minister has accused them of treason and sought to revoke their citizenship. — Matthew Carey, Deadline, 25 Sep. 2026

These people are opening the door to our enemies, which used to be called treason. — Voice Of The People, New York Daily News, 18 Sep. 2026

But the hostility toward Jews was evident during the Dreyfus affair, which saw Alfred Dreyfus, a Jewish captain in the French army, wrongly convicted of treason in 1894. — Barbara Spindel, Christian Science Monitor, 2 Sep. 2026

In Russian law, treason is understood as a form of espionage—compromising or working against the Russian state to benefit a foreign power. — Andrei Soldatov, Foreign Affairs, 31 Aug. 2026