Find Antonyms

speedup Antonyms

Opposite of speedup

Because the opposite of speedup shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• noun (Context 1)

An increase in the rate of speed, progress, or activity.

Usage Example

"Upgrading the server hardware resulted in a noticeable slowdown in data processing."

Strongest
slowdown
deceleration
Strong
retardation

• noun (Context 2)

An employer's demand for increased output from workers without a corresponding increase in wages.

Usage Example

"The factory union voted to go on strike to protest the management's latest assembly-line slowdown."

Strongest
slowdown

Similar words to speedup

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

acceleration
quickening
hastening
step-up
See all synonyms of speedup

• Nearby Words

speedreading
speedrun
speedster
speedup
speedwalk
speedway
speedy

Cite this Entry

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