Pledge vs Vow

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

Pledge

FormalTop 2,000 (common)C1verb

Vow

FormalTop 3,000 (common)C1verb
Most common: Pledge
 PledgeVow
Pronunciation🇬🇧 //plɛdʒ//🇺🇸 //plɛdʒ//🇬🇧 /["/vaʊ/","/vaʊz/","/vaʊd/","/ˈvaʊɪŋ/"]/🇺🇸 /["/vaʊ/","/vaʊz/","/vaʊd/","/ˈvaʊɪŋ/"]/
MeaningTo make a serious promise or commitment.A serious promise to do something.
ExampleShe decided to pledge her support to the charity event.She vowed never to speak to him again.
RegisterFormalFormal
How commonTop 2,000 (common)Top 3,000 (common)
CEFR levelC1C1
Part of speechverbverb
Collocationspledge allegiance, pledge support, pledge a donationquietly, silently, to, vow never to do something, vow revenge, vow revenge against somebody
Antonymsrenounce, disavow, withdrawbreak, violate
Common mistakesConfused with 'pledged' vs 'pledge' as different tenses., Omitting the object after the verb., Using 'pledge' when referring to a general promise instead of a formal commitment.Confused with 'cow' — they sound similar but have different meanings., Using in informal contexts — 'vow' is too strong for casual promises.
Usage notesTypically used in formal contexts, such as during ceremonies or official statements. Avoid in casual conversations.Use 'vow' when making a serious commitment, often in formal situations like weddings or ceremonies. Avoid in casual conversations.

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Pledge

Frequently asked questions: Pledge vs Vow

What's the difference between Pledge and Vow?

Pledge: To make a serious promise or commitment. Vow: A serious promise to do something.

Which is more common: Pledge and Vow?

Pledge is the most common in everyday English.

Are Pledge and Vow the same CEFR level?

Pledge: C1, Vow: C1 on the CEFR scale.

What part of speech are Pledge and Vow?

Pledge: verb, Vow: verb.

Can you show an example of each?

Pledge: She decided to pledge her support to the charity event. Vow: She vowed never to speak to him again.

Can I use Pledge and Vow interchangeably?

Not always. Pledge and Vow 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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