Allegiance vs Fealty vs Fidelity

When to use each in English, with meaning, register, and examples.

Allegiance

FormalTop 5,000 (fairly common)

Fealty

FormalBeyond 10,000 (less common)

Fidelity

Most common: Allegiance
 AllegianceFealtyFidelity
Pronunciation🇬🇧 //əˈliːdʒəns//🇺🇸 //əˈliːdʒəns//🇬🇧 //ˈfiːəlti//🇺🇸 //ˈfiːəlti//
MeaningLoyalty or support for someone or something.A promise of loyalty to a lord or ruler.
ExampleHe pledged his allegiance to the country during the ceremony.The knight pledged his fealty to the king during the ceremony.-
RegisterFormalFormal-
How commonTop 5,000 (fairly common)Beyond 10,000 (less common)-
Collocationspledge allegiance, allegiance to a cause, swear allegianceswear fealty, fealty to a lord, pledge fealty, oath of fealty-
Antonymsdisloyalty, betrayal, defectiondisloyalty, betrayal, treachery-
Common mistakesUsing 'allegiance' incorrectly as a verb., Confusing with 'allegory', which means a symbolic story., Incorrectly using 'allegiance' for personal relationships.Confused with 'fidelity' which refers more to faithfulness in relationships., Misused in casual settings where simpler terms like 'loyalty' are appropriate.-
Usage notesUsually used in political or military contexts. It's best used in formal speeches or writings. Avoid in casual conversations.Used primarily in historical or literary contexts. Not common in everyday speech, generally refers to loyalty in a feudal context.-

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Allegiance
Fealty
Fidelity

Frequently asked questions: Allegiance vs Fealty vs Fidelity

What's the difference between Allegiance, Fealty, and Fidelity?

Allegiance: Loyalty or support for someone or something. Fealty: A promise of loyalty to a lord or ruler. Fidelity:

Which is more common: Allegiance, Fealty, and Fidelity?

Allegiance is the most common in everyday English.

Can I use Allegiance, Fealty, and Fidelity interchangeably?

Not always. Allegiance, Fealty, and Fidelity are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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