Capsule vs Container

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

Capsule

Top 5,000 (fairly common)C1noun

Container

Top 2,000 (common)B1noun
Most common: Container
 CapsuleContainer
Pronunciation🇬🇧 //ˈkæpsjuːl//🇺🇸 //ˈkæpsəl//🇬🇧 /["/kənˈteɪnə(r)/"]/🇺🇸 /["/kənˈteɪnər/"]/
MeaningA small container for medicine or other items.A box or other object used to hold things.
ExampleShe took a capsule with water to relieve her headache.The package arrived in a large container that was difficult to open.
RegisterNeutralNeutral
How commonTop 5,000 (fairly common)Top 2,000 (common)
CEFR levelC1B1
Part of speechnounnoun
Collocationstime capsule, medication capsule, space capsule, gelatin capsule, dry capsuleairtight, closed, sealed, fill, store something in, contain something, hold something, garden, plant, in a/​the container, container for, container of, empty, full, bulk, contain something, hold something, lorry, ship, port
Antonymsexpansion, unfolding, openingsource, origin, emptiness
Common mistakesConfusing with 'capstone', which refers to a finishing stone., Using 'capsule' to refer to large containers., Mispronouncing with emphasis on the second syllable instead of the first.'Container' is sometimes confused with 'content' - remember, 'container' holds things, 'content' is what is inside., Some learners use 'conteneer' instead of 'container' due to phonetic similarities., It's often mistakenly pluralized as 'containerss'.
Usage notesUsed in medical contexts for pills and in general contexts for small containers. Avoid using in very casual settings.Used in everyday contexts, 'container' fits well in both casual and professional speech. It may not be suitable for very formal writing where more specific terms like 'receptacle' might be preferred.

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Container

Frequently asked questions: Capsule vs Container

What's the difference between Capsule and Container?

Capsule: A small container for medicine or other items. Container: A box or other object used to hold things.

Which is more common: Capsule and Container?

Container is the most common in everyday English.

Which is more advanced: Capsule and Container?

Capsule is the highest level, at C1, on the CEFR scale.

Are Capsule and Container the same CEFR level?

Capsule: C1, Container: B1 on the CEFR scale.

What part of speech are Capsule and Container?

Capsule: noun, Container: noun.

Can you show an example of each?

Capsule: She took a capsule with water to relieve her headache. Container: The package arrived in a large container that was difficult to open.

Can I use Capsule and Container interchangeably?

Not always. Capsule and Container 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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