Accelerate vs Expedite

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

Accelerate

Top 2,000 (common)C1verb

Expedite

FormalBeyond 10,000 (less common)
Most formal: ExpediteMost common: Accelerate
 AccelerateExpedite
Pronunciation🇬🇧 /["/əkˈseləreɪt/","/əkˈseləreɪts/","/əkˈseləreɪtɪd/","/əkˈseləreɪtɪŋ/"]/🇺🇸 /["/əkˈseləreɪt/","/əkˈseləreɪts/","/əkˈseləreɪtɪd/","/əkˈseləreɪtɪŋ/"]/🇬🇧 //ˈɛkspədaɪt//🇺🇸 //ˈɛkspədaɪt//
MeaningTo go faster or make something go faster.To make something happen faster.
ExampleThe company aims to accelerate the development of new technologies.We need to expedite the approval process for this project.
RegisterNeutralFormal
How commonTop 2,000 (common)Beyond 10,000 (less common)
CEFR levelC1-
Part of speechverb
Collocationsdramatically, greatly, rapidly, hard, quickly, smoothlyexpedite a process, expedite delivery, expedite approval, expedite a request, expedite a project
Antonymsdecelerate, slow downdelay, prolong, hinder
Common mistakesConfused with 'decelerate' (which means to slow down)., Using 'accelerate' without an object when it should have one., Incorrectly assuming it can only apply to vehicles.Confused with 'expedite' vs 'expediting' - remember 'expedite' is the base form., Using 'expedite' with incorrect subjects - it should always be followed by an object., Assuming 'expedite' is interchangeable with 'speed up' in all contexts - it's more formal.
Usage notesUsed in both formal and casual contexts, often related to speed, processes, or improvements. Not typically used in very informal conversation.Use 'expedite' in formal contexts, especially in business or legal situations. Avoid casual conversation.

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Expedite

Frequently asked questions: Accelerate vs Expedite

What's the difference between Accelerate and Expedite?

Accelerate: To go faster or make something go faster. Expedite: To make something happen faster.

Which is more formal: Accelerate and Expedite?

Expedite is the most formal of these.

Which is more common: Accelerate and Expedite?

Accelerate is the most common in everyday English.

Can you show an example of each?

Accelerate: The company aims to accelerate the development of new technologies. Expedite: We need to expedite the approval process for this project.

Can I use Accelerate and Expedite interchangeably?

Not always. Accelerate and Expedite 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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