Addition
Addition noun - Something added (as by growth).
Usage example: the cache of old stamps I found in the discarded desk was a huge addition to my stamp collection
Reduction is an antonym for addition in topics: counting up, subtraction, adding, enlargement of something, arithmetical process of augmentation.
Reduction
Reduction noun - Something that is or may be subtracted.
Usage example: there was a sizable reduction in her weekly pay when she decided to buy health insurance
How words are described
Both words in one sentence
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The Lizard is explicitly shown to have armored skin and a Healing Factor, but it is never made clear whether Peter has any sort of damage reduction power in addition to his strength and speed.
Source: Film / The Amazing Spider-Man -
In addition, some enemies have the Hardened property, which drastically reduces the likelihood of a Critical Hit; more often than not, the reduction is big enough that you'll get a fat 0% chance to crit.
Source: Video Game / XCOM: Enemy Unknown -
In addition to losing your current supply of souls and having only one chance to retrieve them, each time you die, you suffer a permanent reduction to your maximum health that bottoms out from -50% to -90%.
Source: Video Game / Dark Souls II
Cite this Source
Reduction and Addition. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/addition/reduction
Addition & Reduction. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/addition/reduction>.
Reduction or Addition. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/addition/reduction.
Google Ngram Viewer shows how "addition" and "reduction" have occurred on timeline