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
  • While introducing a range of endearingly unreliable characters, the action rolls out a succession of comically absurd situations that provide laughs from the film’s beginning to its end.
    Joan MacDonald, Forbes.com, 9 July 2025
  • However, by 2024, this gimbal had grown unreliable due to age, and so the Climate Sounder now relies on the standard 28-degree rolls to make its observations.
    Keith Cooper, Space.com, 7 July 2025
Adjective
  • The Department of Homeland Security said in a statement that the claims are false.
    Alicia Victoria Lozano, NBC news, 3 July 2025
  • The City of Odessa, Texas, also said claims of a serial killer in the area were false in a Dec. 9 Facebook post.
    Joe Rassel, The Orlando Sentinel, 3 July 2025
Adjective
  • 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
  • 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
Adjective
  • At least three people were killed in the treacherous flood waters streaming through a mountain village in New Mexico, which also knocked an entire home from its foundations and then swept it away.
    Jessica Schladebeck, New York Daily News, 9 July 2025
  • The search has been complicated by treacherous terrain, and the fact that crews are looking for an Army veteran skilled in wilderness survival who had a three-day head start.
    Cindy Von Quednow, CNN Money, 7 July 2025

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Cite this Entry

“Faithless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/faithless. Accessed 19 Jul. 2025.

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