Synonyms of perfidiousness

15 similar words

Another word for perfidiousness is double-dealing. Other synonyms of perfidiousness are treachery, treacherousness, betrayal, breach of promise and breach of trust.

Synonyms and similar words for perfidiousness

double-dealingDeceit or treachery.
treacheryAn act or instance of treachery.
treacherousnessTreachery; the characteristic of being treacherous.
betrayalThe act of betraying.
breach of promise
breach of trustAn act, omission or concealment, by which a person who has a fiduciary duty to act in the interest of another instead...
Judas kissAny act of treachery under the guise of kindness.
perfidyA state or act of violating faith or allegiance; violation of a promise or vow, or of trust.
stab in the backAn act of betrayal or treachery.
tergiversationThe act of abandoning something or someone, of changing sides; desertion; betrayal.
treasonThe crime of betraying one’s own country.
prodition obsoleteTreachery; treason.
Punic faith archaicTreachery, deceitfulness, bad faith.
swike dialectal, obsoleteDeceit; treachery.
traitory obsoleteTreachery; acts of a traitor.

What is another word for perfidiousness?: Perfidiousness has 15 synonyms on Word.ws, such as double-dealing, treachery, treacherousness, betrayal, breach of promise, breach of trust, Judas kiss and perfidy.
What does perfidiousness mean?: Perfidiousness means unfaithfulness; deceitfulness; perfidy.

Adapted from Wiktionary: perfidiousness (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Cite this page: “Synonyms of perfidiousness.” Word.ws, https://word.ws/synonyms/perfidiousness. Based on Wiktionary, CC BY-SA 4.0.