Cool MateDuration vs Extent vs Length vs Span
When to use each in English, with meaning, register, and examples.
Duration
Extent
Length
Span
| Duration | Extent | Length | Span | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/djuˈreɪʃn/"]/🇺🇸 /["/duˈreɪʃn/"]/ | 🇬🇧 /["/ɪkˈstent/"]/🇺🇸 /["/ɪkˈstent/"]/ | 🇬🇧 /["/leŋkθ/"]/🇺🇸 /["/leŋkθ/"]/ | 🇬🇧 /["/spæn/","/spænz/","/spænd/","/ˈspænɪŋ/"]/🇺🇸 /["/spæn/","/spænz/","/spænd/","/ˈspænɪŋ/"]/ |
| Meaning | The length of time something lasts. | The degree or amount of something. | How long something is from one end to another. | To stretch across or cover an area. |
| Example | The school was used as a hospital for the duration of the war. | The extent of the damage was greater than we initially thought. | The length of the table is about two meters. | His acting career spanned 55 years. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 2,000 (common) | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | B2 | B2 | B1 | C1 |
| Part of speech | noun | noun | noun | verb |
| Collocations | brief, short, limited, decrease, reduce, shorten, for the duration (of), of… duration, throughout the duration of | full, greatest, maximum, reach, see, consider, in extent, to an extent, to a…extent, at something’s greatest extent, to a considerable extent, to a great extent, full, greatest, maximum, reach, see, consider, in extent, to an extent, to a…extent, at something’s greatest extent, to a considerable extent, to a great extent | entire, full, maximum, estimate, measure, have, along the length of, in length, at arm’s length, double, twice, three times, half, etc. the length of something, considerable, great, inordinate, cut, reduce, shorten, increase, decrease, at length, in length, length of time, do, swim | span a distance, span a period of time, span generations, span across, span the globe |
| Antonyms | moment, instant | limited, minimal, modest | shortness | contract, recede, shorten |
| Common mistakes | Confused with 'session', which refers to a specific meeting or period of activity., Using it incorrectly as a verb, e.g., 'to duration something.', Mixing it up with 'interval,' which refers to a break or pause rather than the length. | Using 'extent' as a verb rather than a noun., Confusing 'extent' with 'extent of' when referring to limits or boundaries., Overusing 'extent' when a simpler term like 'amount' would be clearer. | Confused with 'height' or 'width'., Incorrectly using as a verb., Using 'length' to describe time without context. | Confused with 'spend' in terms of time context., Used incorrectly in passive voice; 'spanned' should be used when something is already in the past., Misused in context; often used incorrectly as a synonym for 'cover' or 'contain'. |
| Usage notes | Commonly used in both formal and informal contexts. Refers to time periods, such as how long a movie is or how long an event lasts. Avoid using it in very casual conversations. | Use 'extent' in formal or written contexts when discussing levels or degrees. It's less common in everyday speech. | Use 'length' when discussing size or duration. It's appropriate in both everyday and academic contexts; avoid using in very casual situations. | Use 'span' to describe distance, duration, or extent. More common in technical or descriptive contexts. Avoid in very casual conversation. |
Frequently asked questions: Duration vs Extent vs Length vs Span
What's the difference between Duration, Extent, Length, and Span?
Duration: The length of time something lasts. Extent: The degree or amount of something. Length: How long something is from one end to another. Span: To stretch across or cover an area.
Which is more common: Duration, Extent, Length, and Span?
Length is the most common in everyday English.
Which is more advanced: Duration, Extent, Length, and Span?
Span is the highest level, at C1, on the CEFR scale.
Are Duration, Extent, Length, and Span the same CEFR level?
Duration: B2, Extent: B2, Length: B1, Span: C1 on the CEFR scale.
What part of speech are Duration, Extent, Length, and Span?
Duration: noun, Extent: noun, Length: noun, Span: verb.
Can you show an example of each?
Duration: The school was used as a hospital for the duration of the war. Extent: The extent of the damage was greater than we initially thought. Length: The length of the table is about two meters. Span: His acting career spanned 55 years.
Can I use Duration, Extent, Length, and Span interchangeably?
Not always. Duration, Extent, Length, and Span 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.