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deceleration
noun
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Divide deceleration into syllables:

de · cel · er · a · tion

How to pronounce deceleration:

Definition of deceleration:

deceleration (noun):
a gradual weakening or loss
a decrease in rate of change.

Synonyms for deceleration:

braking
change
decline
decrease
deterioration
downshift
downward trend
drop
ebb
falling off
letup
modification
plunge
retardation
retreat
slackening
slowdown
slowing
slowing down
slump
waning
weakening
worsening

Antonyms for deceleration:

acceleration
breakthrough
hastening
increase
quickening
rise
speed-up
upshift

Other 5-syllable words like deceleration

Here are some other common words that have 5 syllables, like deceleration does.

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Syllable Quiz
How many syllables in the word deccan?

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