MENDACIOUSNESS Synonyms: 50 Similar and Opposite Words

mendaciousness

noun

Definition of mendaciousness

as in deceit

the tendency to tell lies her memoirs have such an air of pervasive mendaciousness that she seems to have lost all sense of what truth is

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for mendaciousness

Noun

There was money, manipulation, secret meetings with shady characters in China, fake identities, lies, trickery, and deceit.

— Eamon Javers, CNBC, 30 Sep. 2026
Its Emmy success, and Rhys’s record-setting win along with it, is built on a foundation of deceit.

— Kathryn VanArendonk, Vulture, 25 Sep. 2026

Definition of deceit

Noun

Antisocial personality includes a persistent pattern of traits such as callousness, lack of concern, deceitfulness, and irresponsibility, Ryan said.

— Harriet Ramos, Fort Worth Star-Telegram, 29 Apr. 2026
Perfidy — from the French perfidie via the Latin perfidia — means deceitfulness, treachery or a breach of faith or promise.

— Harmeet Kaur, CNN Money, 21 Jan. 2026

Definition of deceitfulness

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.

Browse Nearby Words

mendaciously

mendaciousness

mendacities

See all Nearby Words

Cite this Entry

Style

“Mendaciousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendaciousness. Accessed 9 Oct. 2026.

Copy Citation

Synonyms of mendaciousness

noun

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

inscrutable

Popular in Grammar & Usage

Do You Need a New Language Peeve?

The Exceptions of '-s' and '-es' Plurals

Merriam-Webster’s Great Big List of Words You Love to Hate

Is it 'nerve-racking' or 'nerve-wracking'?

What's the difference between 'fascism' and 'socialism'?

Popular in Wordplay

The Real Origin of 'Supercalifragilistic'

9 Words That Sound Like Insults But Aren't

7 Words for Bad Endings and Rough Situations

The Words of the Week - Oct. 9

Even More Bird Names that Sound Like Insults (and Sometimes Are)

Popular

Do You Need a New Language Peeve?

The Real Origin of 'Supercalifragilistic'

9 Words That Sound Like Insults But Aren't

Games & Quizzes