Flatten
Flatten verb - To make free from breaks, curves, or bumps.
Make straight and flatten are semantically related. In some cases you can use "Make straight" instead a verb "Flatten".
Make straight
Flatten and make straight are semantically related. Sometimes you can use "Flatten" instead a verb phrase "Make straight".
Mutual synonyms
Cite this Source
Make straight and Flatten. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/flatten/make_straight
Flatten & Make straight. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/flatten/make_straight>.
Make straight or Flatten. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/flatten/make_straight.
Google Ngram Viewer shows how "flatten" and "make straight" have occurred on timeline