Miles an hour vs Speed

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

Miles an hour

Top 2,000 (common)

Speed

Top 1,000 (very common)A2noun
Most common: Speed
 Miles an hourSpeed
Pronunciation🇬🇧 //maɪlz ən aʊə//🇺🇸 //maɪlz ən aʊər//🇬🇧 /["/spiːd/"]/🇺🇸 /["/spiːd/"]/
MeaningHow far something travels in one hour.How fast something moves.
ExampleThe car was driving at 70 miles an hour on the highway.The speed of the car was incredible as it raced down the highway.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR level-A2
Part of speechnoun
Collocationstravel at miles an hour, drive at miles an hour, run at miles an houramazing, astonishing, breakneck, burst, rate, attain, reach, build up, increase, decrease, control, reduction, restriction, at speed, in speed, with speed, at full speed, full speed, full speed ahead, amazing, astonishing, breakneck, burst, rate, attain, reach, build up, increase, decrease, control, reduction, restriction, at speed, in speed, with speed, at full speed, full speed, full speed ahead, amazing, astonishing, breakneck, burst, rate, attain, reach, build up, increase, decrease, control, reduction, restriction, at speed, in speed, with speed, at full speed, full speed, full speed ahead
Antonyms-slowness, laziness
Common mistakesConfusing it with 'miles per hour' as a standard term., Misplacing the order of words when stating speeds., Using the phrase in contexts that do not involve speed.Confusing 'speed' with 'pace' when referring to a specific time or distance., Incorrectly using 'speed' as a verb in sentences., Saying 'the speed' when discussing averages — should specify the context (e.g., 'average speed').
Usage notesUsed to describe speed, typically in driving or travel contexts. Generally casual and can be used in conversation and writing.Use 'speed' in everyday conversations about how quickly something happens. It is appropriate in most contexts, but avoid using it in highly technical discussions unless specifying the type of speed.

See it in real clips

Miles an hour
Speed

Frequently asked questions: Miles an hour vs Speed

What's the difference between Miles an hour and Speed?

Miles an hour: How far something travels in one hour. Speed: How fast something moves.

Which is more common: Miles an hour and Speed?

Speed is the most common in everyday English.

Can you show an example of each?

Miles an hour: The car was driving at 70 miles an hour on the highway. Speed: The speed of the car was incredible as it raced down the highway.

Can I use Miles an hour and Speed interchangeably?

Not always. Miles an hour and Speed 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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