Decrease
Decrease verb - To grow less in scope or intensity especially gradually.
Usage example: the force of the wind slowly decreased until the flowers were standing upright again
Slow down and decrease are semantically related in reduce topic. In some cases you can use "Slow down" instead a verb "Decrease", when it comes to topics like grow less or make less.
Slow down
Slow down verb - Lose velocity; move more slowly.
Mutual synonyms
Both terms in one sentence
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Caltrops: Ninja weapons include makibishi (the Japanese name for the trope) that can be thrown to slow down enemies and decrease their stamina.
Source: Video Game / Nioh - As people age their daily activity levels decrease and their growth and recovery mechanisms slow down or stop.
Source: The Sleepless -
Pushing the throttle forward would actually close it, making the train slow down (and eventually stop) while a rise in speed would cause the boiler pressure to decrease.
Source: Just Train Wrong
Cite this Source
Slow down and Decrease. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/decrease/slow_down
Decrease & Slow down. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/decrease/slow_down>.
Slow down or Decrease. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/decrease/slow_down.
Google Ngram Viewer shows how "decrease" and "slow down" have occurred on timeline