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accelerate Antonyms

Opposite of accelerate

Because the opposite of accelerate shifts with each meaning, the 11 antonyms and opposite words below are separated across 4 exact definitions and ranked by contrast strength.
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• verb (Context 1)

To begin to move more quickly, or to cause a vehicle or object to increase its speed.

Usage Example

"The driver had to decelerate smoothly to merge into the fast-moving highway traffic."

Strongest
decelerate
slow down
slow
Strong
brake

• verb (Context 2)

To cause a process, event, or change to happen sooner or develop more rapidly.

Usage Example

"Warm spring temperatures and steady rainfall helped delay the growth of the newly planted crops."

Strongest
delay
retard
slow down
Strong
impede
hinder
hold back

• verb (Context 3)

To undergo a change in velocity, either in speed or direction (in physics and mechanics).

Usage Example

"According to Newton's second law, an object will decelerate in the direction of the net force applied to it."

Strongest
decelerate

• adjective (Context 4)

Quickened, hastened, or moving at an increased rate of speed (now archaic or poetic, except in biology to describe a stage of development occurring earlier than usual).

Usage Example

"Certain amphibian species exhibit retarded development when environmental conditions require rapid metamorphosis."

Strong
retarded
delayed

Similar words to accelerate

Words similar to accelerate shift depending on context. Common synonyms include:

speed up
accelerated
expedite
hasten
quickened
quicken
hastened
precipitate
See all synonyms of accelerate

Cite this Entry


Wordmom. (2026). Antonyms for Accelerate. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/accelerate
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