Authority vs Command

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

Authority

Top 2,000 (common)B1noun

Command

Top 1,000 (very common)B2noun
Most common: Command
 AuthorityCommand
Pronunciation🇬🇧 //əˈθɔːrɪti//🇺🇸 //əˈθɔːrɪti//🇬🇧 /["/kəˈmɑːnd/"]/🇺🇸 /["/kəˈmænd/"]/
MeaningThe power or right to give orders and make decisions.An order to do something.
ExampleThe teacher has authority over the students.Her ability to command attention in the classroom is impressive.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB1B2
Part of speechnounnoun
Collocationsexercise authority, recognize authority, challenge authoritybasic, simple, carry out, obey, disobey, at somebody’s command, your wish is my command, spoken, verbal, voice, enter, type, use, line, prompt, complete, full, total, have, assume, take, centre/​center, chair, deck, in command, in command of, under somebody’s command, the chain of command, the line of command, excellent, fluent, good, have, demonstrate, show, at your command, command of
Antonymspowerlessness, subordinationsubmission, compliance, inaction
Common mistakesConfused with 'author' - authority refers to power, not authorship., Misused in singular form; should often use 'authorities' for multiple groups or people.'Command' is confused with 'demand' but is less aggressive., Learners often use 'command' without an object, forgetting it typically requires one., Mispronouncing 'command' as 'comand'.
Usage notesUsed in both formal and informal contexts. Often refers to organizations or individuals in positions of power.Use 'command' when giving direct instructions, especially in formal contexts like military or authority. Avoid in casual conversations where 'ask' or 'request' might be more appropriate.

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Authority
Command

Frequently asked questions: Authority vs Command

What's the difference between Authority and Command?

Authority: The power or right to give orders and make decisions. Command: An order to do something.

Which is more common: Authority and Command?

Command is the most common in everyday English.

Which is more advanced: Authority and Command?

Command is the highest level, at B2, on the CEFR scale.

Are Authority and Command the same CEFR level?

Authority: B1, Command: B2 on the CEFR scale.

What part of speech are Authority and Command?

Authority: noun, Command: noun.

Can you show an example of each?

Authority: The teacher has authority over the students. Command: Her ability to command attention in the classroom is impressive.

Can I use Authority and Command interchangeably?

Not always. Authority and Command 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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