Duty vs Work

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

Duty

Top 1,000 (very common)B1noun

Work

High-frequency chunkA1verb
 DutyWork
Pronunciation🇬🇧 /["/ˈdjuːti/"]/🇺🇸 /["/ˈduːti/"]/🇬🇧 /["/wɜːk/","/wɜːks/","/wɜːkt/","/ˈwɜːkɪŋ/"]/🇺🇸 /["/wɜːrk/","/wɜːrks/","/wɜːrkt/","/ˈwɜːrkɪŋ/"]/
MeaningA responsibility or job that someone must do.To do a job or task.
ExampleHe felt it was his duty to help the less fortunate.I need to work on my homework before dinner.
RegisterNeutralNeutral
How commonTop 1,000 (very common)High-frequency chunk
CEFR levelB1A1
Part of speechnounverb
Collocationscontractual, legal, statutory, have, owe, carry out, call, under a/​the duty, duty of, duty to, a breach of duty, do your duty by somebody, be duty bound to do something, light, onerous, day, have, pull, see, fall to somebody, manager, officer, doctor, off duty, on duty, the execution of your duties, the performance of your duties, light, onerous, day, have, pull, see, fall to somebody, manager, officer, doctor, off duty, on duty, the execution of your duties, the performance of your duties, heavy, high, low, amount, impose, slap on somebody/​something, increase, be payable, in duty, duty onhard, tirelessly, assiduously, continue to, choose to, prefer to, as, at, for, hard, tirelessly, assiduously, continue to, choose to, prefer to, as, at, for, correctly, effectively, efficiently, seem to, work like a charm, work like magic, work to somebody’s advantage, correctly, effectively, efficiently, seem to, work like a charm, work like magic, work to somebody’s advantage
Antonymsirresponsibility, neglectrest, idleness, leisure
Common mistakesConfused with 'dutie', incorrect spelling., Using 'duty' with a subject instead of a verb; 'duty to help' not 'duty help'., Not using it with the correct preposition, often omitting 'to'.Confused with 'job' vs 'work': 'Job' is a specific role, while 'work' refers to the tasks involved., Using 'work' as a noun in contexts needing a verb: e.g., saying 'I will work tomorrow' instead of 'I will do work tomorrow.', Omitting plural forms: e.g., saying 'We all have work to do' is correct, but learners may mistakenly say 'We all have works to do.'
Usage notesUsed in both formal and informal contexts. Often relates to moral or legal responsibilities. Avoid using it in casual conversations where lighter terms like 'task' may fit better.Use 'work' in professional or casual contexts to refer to tasks or jobs. Avoid using in overly formal settings where a more specific term may be preferred.

Frequently asked questions: Duty vs Work

What's the difference between Duty and Work?

Duty: A responsibility or job that someone must do. Work: To do a job or task.

Are Duty and Work the same CEFR level?

Duty: B1, Work: A1 on the CEFR scale.

Can I use Duty and Work interchangeably?

Not always. Duty and Work 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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