Capacity vs Role

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

Capacity

Top 2,000 (common)B2noun

Role

Top 1,000 (very common)A2noun
Most common: Role
 CapacityRole
Pronunciation🇬🇧 //kəˈpæs.ɪ.ti//🇺🇸 //kəˈpæ.sɪ.ti//🇬🇧 /["/rəʊl/"]/🇺🇸 /["/rəʊl/"]/
MeaningHow much something can hold or do.A part someone plays in a situation or story.
ExampleThe capacity of the stadium is 50,000 people.He took on the role of team leader during the project.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB2A2
Part of speechnounnoun
Collocationsfull capacity, seating capacity, at capacity, capacity limitslead, leading, starring, assume, perform, play, in the role (of), big, huge, large, have, occupy, perform, model, reversal, expectation, in a/​the role, role as, role at, big, huge, large, have, occupy, perform, model, reversal, expectation, in a/​the role, role as, role at
Antonymsinability, incapacityunimportance, insignificance
Common mistakesConfused with 'capability', which refers to ability rather than volume., Using 'capacity' for individual abilities when 'capability' is more appropriate., Mispronouncing the word with emphasis on the wrong syllable.Confusing 'role' with 'roll', the latter meaning to turn over or to have a cylindrical shape., Using 'role' without a specific context, e.g., 'What is your role?' is better than just 'What is role?', Omitting 'in' when discussing roles in activities, e.g., 'His role in the project.'
Usage notesUsed in both formal and informal contexts. Common in discussions about limits or ability. Not typically used in casual conversation unless referring to space or limits.Use 'role' when discussing duties in work or positions in stories. Be cautious not to confuse with 'roll' which is a different word. Appropriate in both formal and informal settings.

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Capacity
Role

Frequently asked questions: Capacity vs Role

What's the difference between Capacity and Role?

Capacity: How much something can hold or do. Role: A part someone plays in a situation or story.

Which is more common: Capacity and Role?

Role is the most common in everyday English.

Which is more advanced: Capacity and Role?

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

Are Capacity and Role the same CEFR level?

Capacity: B2, Role: A2 on the CEFR scale.

What part of speech are Capacity and Role?

Capacity: noun, Role: noun.

Can you show an example of each?

Capacity: The capacity of the stadium is 50,000 people. Role: He took on the role of team leader during the project.

Can I use Capacity and Role interchangeably?

Not always. Capacity and Role 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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