Break
Break verb - To cause to separate into pieces usually suddenly or forcibly.
Flatten
Flatten verb - To make free from breaks, curves, or bumps.
Common collocations
Both words in one sentence
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He doesn't have stubble, but when you can stop bullets from reaching your skin, break bones by thinking about it, and can flatten NYC then you can be a nitpicker.
Source: Trenchcoat Brigade - Neoshadows are particularly annoying, both because they travel in swarms (so you end up getting repeatedly pounded after a single card-break), and because they can flatten themselves against the ground to avoid your sleights (normal Shadows can do this, too, but they're much weaker).
Cite this Source
Flatten and Break. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/break/flatten
Break & Flatten. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/break/flatten>.
Flatten or Break. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/break/flatten.
Google Ngram Viewer shows how "break" and "flatten" have occurred on timeline