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

Jane was subsequently convicted of treason and sentenced to death. —Pan Pylas, Chicago Tribune, 9 Mar. 2025

Yoon has presidential immunity from most criminal prosecutions but that doesn’t cover grave charges like rebellion and treason. —Hyung-Jin Kim, Los Angeles Times, 8 Mar. 2025

Putin tried the same thing with his long-time collaborator Viktor Medvedchuk, his pick for a puppet leader, before Medvedchuk was arrested on treason charges in April 2022. —Illia Ponomarenko, TIME, 6 Mar. 2025

Ocalan was captured in 1999 in Kenya by Turkish authorities, reportedly with the help of the CIA, and sentenced to life imprisonment for treason. —Nadeen Ebrahim, CNN, 28 Feb. 2025