Commitment vs Dedication vs Obligation vs Pledge

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

Commitment

Top 2,000 (common)B2noun

Dedication

Top 1,000 (very common)C1noun

Obligation

Top 2,000 (common)B2noun

Pledge

FormalTop 2,000 (common)C1verb
Most formal: PledgeMost common: Dedication
 CommitmentDedicationObligationPledge
Pronunciation🇬🇧 /["/kəˈmɪtmənt/"]/🇺🇸 /["/kəˈmɪtmənt/"]/🇬🇧 /["/ˌdedɪˈkeɪʃn/"]/🇺🇸 /["/ˌdedɪˈkeɪʃn/"]/🇬🇧 /["/ˌɒblɪˈɡeɪʃn/"]/🇺🇸 /["/ˌɑːblɪˈɡeɪʃn/"]/🇬🇧 //plɛdʒ//🇺🇸 //plɛdʒ//
MeaningA promise to do something or stay loyal.Being committed to a task or purpose.Something you must do; a duty or responsibility.To make a serious promise or commitment.
ExampleHis commitment to the project ensured its success.hard work and dedicationShe felt a strong obligation to help her friends in need.She decided to pledge her support to the charity event.
RegisterNeutralNeutralNeutralFormal
How commonTop 2,000 (common)Top 1,000 (very common)Top 2,000 (common)Top 2,000 (common)
CEFR levelB2C1B2C1
Part of speechnounnounnounverb
Collocationsabsolute, complete, full, degree, level, give, make, demonstrate, commitment on, commitment to, a lack of commitment, absolute, complete, full, degree, level, give, make, demonstrate, commitment on, commitment to, a lack of commitment, big, considerable, major, have, take on, fulfil/​fulfill, commitment on, heavy, time, commitment ofcomplete, total, great, have, demonstrate, show, dedication tocontractual, legal, statutory, carry out, discharge, fulfil/​fulfill, arise from something, under an obligation, without obligation, obligation of, contractual, legal, statutory, carry out, discharge, fulfil/​fulfill, arise from something, under an obligation, without obligation, obligation ofpledge allegiance, pledge support, pledge a donation
Antonymsdisloyalty, indifferenceindifference, apathy, disinterestfreedom, option, choicerenounce, disavow, withdraw
Common mistakesUsing 'commitment' without specifying what it's to., Confusing 'commitment' with 'commit' as a verb., 'Commitment' often misused in informal contexts.Confused with 'dedicate', which is a verb., Using 'dedication' without a specific subject, making it seem vague., Mixing up 'dedication' with 'devotion', thinking they mean the same.Confused with 'obligated' — remember 'obligation' is the noun., Using 'obligation' with incorrect prepositions — typically used with 'to' (e.g., obligation to pay)., Overusing in casual speech — more common in formal contexts.Confused 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.
Usage notesUsed when discussing promises or obligations in personal or professional contexts. It's generally appropriate in serious discussions and may not fit casual chatting.Use 'dedication' when discussing commitment to work, goals, or projects. It's appropriate in both personal and professional contexts but may sound too formal in casual conversations.Use 'obligation' in both formal and informal contexts when discussing responsibilities or duties. It's appropriate in legal, academic, or personal situations but less common in casual conversations.Typically used in formal contexts, such as during ceremonies or official statements. Avoid in casual conversations.

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Commitment
Dedication
Pledge

Frequently asked questions: Commitment vs Dedication vs Obligation vs Pledge

What's the difference between Commitment, Dedication, Obligation, and Pledge?

Commitment: A promise to do something or stay loyal. Dedication: Being committed to a task or purpose. Obligation: Something you must do; a duty or responsibility. Pledge: To make a serious promise or commitment.

Which is more formal: Commitment, Dedication, Obligation, and Pledge?

Pledge is the most formal of these.

Which is more common: Commitment, Dedication, Obligation, and Pledge?

Dedication is the most common in everyday English.

Are Commitment, Dedication, Obligation, and Pledge the same CEFR level?

Commitment: B2, Dedication: C1, Obligation: B2, Pledge: C1 on the CEFR scale.

What part of speech are Commitment, Dedication, Obligation, and Pledge?

Commitment: noun, Dedication: noun, Obligation: noun, Pledge: verb.

Can you show an example of each?

Commitment: His commitment to the project ensured its success. Dedication: hard work and dedication Obligation: She felt a strong obligation to help her friends in need. Pledge: She decided to pledge her support to the charity event.

Can I use Commitment, Dedication, Obligation, and Pledge interchangeably?

Not always. Commitment, Dedication, Obligation, and Pledge 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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