Synonym Chooser

How is the word faithless different from other adjectives like it?

Some common synonyms of faithless are disloyal, false, perfidious, traitorous, and treacherous. While all these words mean "untrue to what should command one's fidelity or allegiance," faithless applies to any failure to keep a promise or pledge or any breach of allegiance or loyalty.

faithless allies

When can disloyal be used instead of faithless?

The synonyms disloyal and faithless are sometimes interchangeable, but disloyal implies a lack of complete faithfulness to a friend, cause, leader, or country.

disloyal to their country

When could false be used to replace faithless?

In some situations, the words false and faithless are roughly equivalent. However, false stresses the fact of failing to be true in any manner ranging from fickleness to cold treachery.

betrayed by false friends

How do perfidious and faithless relate to one another?

Perfidious adds to faithless the implication of an incapacity for fidelity or reliability.

a perfidious double-crosser

When is traitorous a more appropriate choice than faithless?

While the synonyms traitorous and faithless are close in meaning, traitorous implies either actual treason or a serious betrayal of trust.

traitorous acts punishable by death

When might treacherous be a better fit than faithless?

The meanings of treacherous and faithless largely overlap; however, treacherous implies readiness to betray trust or confidence.

a treacherous adviser

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of faithless Men are a structuring absence, as they are spoken of as faithless husbands, potential fiancés, feckless sons. John Bleasdale, Variety, 21 Nov. 2024 But, these faithless actors have never changed the outcome of an election. Solcyré Burga, TIME, 28 Oct. 2024 Since Biden is no longer in the running, they won't be considered faithless. Kaleigh Rogers, ABC News, 23 July 2024 Nellore admits to being of faithless background yet criticizes people of faith. Reader Commentary, Baltimore Sun, 8 Mar. 2024 See All Example Sentences for faithless
Recent Examples of Synonyms for faithless
Adjective
  • There's a delicious whodunit aspect to it, too, as the list of five potentially traitorous suspects includes the operative's own high-profile wife (Cate Blanchett).
    Brian Truitt, USA Today, 4 July 2025
  • Michael Fassbender plays a British intelligence officer tasked with finding who leaked a top-secret software program and betrayed their country, and the list of five potentially traitorous suspects includes his own high-profile wife (Cate Blanchett).
    Brian Truitt, USA Today, 10 May 2025
Adjective
  • Implied in his statement was that the U.S. has become unreliable because of Trump’s haphazard tariff regime, which has gone through aggressive threats and reversals.
    Josh Boak, Chicago Tribune, 17 July 2025
  • Despite the resumptions in service, officials in each area warned residents and business owners that service could be spotty and unreliable in the coming days, and no one ventured to guess when trash service would be restored to normal.
    Caelyn Pender, Mercury News, 16 July 2025
Adjective
  • He’s hosted several world leaders for explosive Oval Office sit downs, including South African President Cyril Ramaphosa, who Trump argued with over false claims that white farmers in the country were victims of a genocide, and Ukrainian President Volodymyr Zelenskyy in February.
    Sara Dorn, Forbes.com, 16 July 2025
  • Mayumi pleaded guilty to a misdemeanor count of false reporting to authorities, while Richard did the same for a felony count of trying to influence a public servant, according to NPR.
    Jessica Sager, People.com, 15 July 2025
Adjective
  • Still, Tiffany is hurt by her mother’s secrecy and frustrated by her father’s claims that her fiancé had been unfaithful.
    Emily Blackwood, People.com, 14 July 2025
  • While their occupation may have created conditions that tested them, the choice to be unfaithful was still deeply personal.
    Mark Travers, Forbes.com, 26 June 2025
Adjective
  • In addition to some light-hearted banter between Thia and Dek, the trailer also gives viewers a look at the treacherous journey ahead of them.
    Caroline Blair, People.com, 23 July 2025
  • Airplanes can be treacherous for people who use wheelchairs.
    Joseph Shapiro, NPR, 17 July 2025

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Cite this Entry

“Faithless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/faithless. Accessed 30 Jul. 2025.

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