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
  • 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
  • Smith made out their former collaborators to be ungrateful and traitorous, and the kids weren't given the space to question her command.
    Zoey Lyttle, People.com, 18 Apr. 2025
Adjective
  • Minimizing unplanned downtime can deliver an impact that becomes amplified when external supply chains are unreliable.
    Ed Garibian, Forbes.com, 25 June 2025
  • Prosecutors in the case called for Clayton to be jailed for 10 years, but the defense argued for acquittal –– saying the woman’s testimony had many questions and was unreliable, according to NHK.
    Karina Tsui, CNN Money, 25 June 2025
Adjective
  • This was a false charge by the Bush administration, as the United Nations’ inspectors on the ground in Iraq tried to communicate to Bush, and as his intelligence agencies tried to tell him.
    Tom Zirpoli, Baltimore Sun, 24 June 2025
  • But an investigation resulted in an astonishing call from the other side of the world, which revealed that ‘The GPO Girl’ was, in fact, a 25-year-old Australian, who has created more than 100 false identities.
    Max Goldbart, Deadline, 24 June 2025
Adjective
  • People who worked on the nighttime emergency schedule were almost 18 times more likely to be unfaithful to their partners than those who worked part-time.
    Mark Travers, Forbes.com, 26 June 2025
  • Vajiralongkorn divorced their mother in 1996 after accusing her of being unfaithful, stripping her and their sons of their titles and forbidding their return to Thailand.
    Charlie Campbell, Time, 26 June 2025
Adjective
  • And yes, much of it involves harrowing drives on treacherous mountain roads, only a few of which — disappointingly, considering the title — are icy.
    Frank Scheck, HollywoodReporter, 26 June 2025
  • But only three of those runs were earned, and three of the hits were pop flies missed due to treacherous winds at Wrigley.
    Sahadev Sharma, New York Times, 22 June 2025

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Cite this Entry

“Faithless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/faithless. Accessed 6 Jul. 2025.

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