Flat
Plain
Plain noun - A broad area of level or rolling treeless country.
Usage example: the first settlers in that area lived on the vast plains in lonely log cabins
Flat is a synonym for plain in characteristic topic. You can use "Flat" instead the word "Plain" as an adjective or a noun or an adverb, if it concerns topics such as big, level land. popular alternative
Mutual synonyms
How words are described
Both words in one sentence
- Instead of being a big boobed blonde with figure accenting armor, instead she wears plate mail, short brunette hair, and a plain but tanned face with a flat nose.
Source: Roleplay / Fate Hollow Order -
The obviousness of it was increased by the person driving the cockroach leaving the cockroach on the President's desk in plain view... where the President sees it and squashes it flat.
Source: Incredibly Obvious Bug -
He just flat out hacks everyone in the area so that they just plain don't see or hear him walking around.
Source: Swiss Cheese Security
Cite this Source
Plain and Flat. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/flat/plain
Flat & Plain. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/flat/plain>.
Plain or Flat. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/flat/plain.
Google Ngram Viewer shows how "flat" and "plain" have occurred on timeline