FIDELITY Synonyms: 40 Similar and Opposite Words

Q: How is the word 'fidelity' distinct from other similar nouns?

Some common synonyms of fidelity are allegiance , devotion , fealty , loyalty , and piety . While all these words mean "faithfulness to something to which one is bound by pledge or duty," fidelity implies strict and continuing faithfulness to an obligation, trust, or duty. // marital fidelity

Q: Where would 'allegiance' be a reasonable alternative to 'fidelity'?

The words allegiance and fidelity are synonyms, but do differ in nuance. Specifically, allegiance suggests an adherence like that of citizens to their country. // pledging allegiance

Q: When would 'devotion' be a good substitute for 'fidelity'?

While the synonyms devotion and fidelity are close in meaning, devotion stresses zeal and service amounting to self-dedication. // a painter's devotion to her art

Q: When can 'fealty' be used instead of 'fidelity'?

The meanings of fealty and fidelity largely overlap; however, fealty implies a fidelity acknowledged by the individual and as compelling as a sworn vow. // fealty to the truth

Q: When might 'loyalty' be a better fit than 'fidelity'?

The words loyalty and fidelity can be used in similar contexts, but loyalty implies a faithfulness that is steadfast in the face of any temptation to renounce, desert, or betray. // valued the loyalty of his friends

Q: When could 'piety' be used to replace 'fidelity'?

The synonyms piety and fidelity are sometimes interchangeable, but piety stresses fidelity to obligations regarded as natural and fundamental. // filial piety

fidelity

noun

fə-ˈde-lə-tē

Definition of fidelity next

as in loyalty

adherence to something to which one is bound by a pledge or duty they have never wavered in their fidelity to the cause of freedom

Synonyms & Similar Words

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How is the word fidelity distinct from other similar nouns?

Some common synonyms of fidelity are allegiance, devotion, fealty, loyalty, and piety. While all these words mean "faithfulness to something to which one is bound by pledge or duty," fidelity implies strict and continuing faithfulness to an obligation, trust, or duty.

marital fidelity

Where would allegiance be a reasonable alternative to fidelity?

The words allegiance and fidelity are synonyms, but do differ in nuance. Specifically, allegiance suggests an adherence like that of citizens to their country.

pledging allegiance

When would devotion be a good substitute for fidelity?

While the synonyms devotion and fidelity are close in meaning, devotion stresses zeal and service amounting to self-dedication.

a painter's devotion to her art

When can fealty be used instead of fidelity?

The meanings of fealty and fidelity largely overlap; however, fealty implies a fidelity acknowledged by the individual and as compelling as a sworn vow.

fealty to the truth

When might loyalty be a better fit than fidelity?

The words loyalty and fidelity can be used in similar contexts, but loyalty implies a faithfulness that is steadfast in the face of any temptation to renounce, desert, or betray.

valued the loyalty of his friends

When could piety be used to replace fidelity?

The synonyms piety and fidelity are sometimes interchangeable, but piety stresses fidelity to obligations regarded as natural and fundamental.

filial piety

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 fidelity The act of professing an oath on a sacred text not only signals fidelity to the Gospel message but also underscores the primacy of scripture to the archbishop’s ministry, a fitting gesture for the nominal leader of one of the largest branches of Christianity. —

Encyclopedia Britannica, 25 Mar. 2026 Agent-to-Agent (A2A) interaction — where a buyer’s AI and a seller’s AI communicate directly through APIs — can compress weeks of supplier negotiations and logistics coordination into minutes of high-fidelity data exchange. —

Kuo Zhang, Fortune, 23 Mar. 2026 Many hospitals and universities are adopting high-fidelity simulators for surgery, emergency care and trauma response. —

Kurt Knutsson, FOXNews.com, 21 Mar. 2026 According to the team, this setup not only produces similar high-fidelity simulations possible in supercomputers, but is considerably faster, enabling simulations to be run in just a week, rather than years. —

Christopher McFadden, Interesting Engineering, 21 Mar. 2026 See All Example Sentences for fidelity

Recent Examples of Synonyms for fidelity

Noun

After leading the initial round of voting with 37%, compared to Fuller's 35%, Harris has framed the runoff as a referendum on independence versus loyalty to Trump.

— Zachary Bynum, CBS News, 8 Apr. 2026
The companies will also partner to host watch parties for major sporting events, and to offr AT&T customers enhanced loyalty points through Fanatics’ FanCash offering.

— Alex Weprin, HollywoodReporter, 8 Apr. 2026