Common
Common adjective - Being of the type that is encountered in the normal course of events.
Usage example: just a common house cat but an extraordinary friend
Plain is a synonym for common in good topic. In some cases you can use "Plain" instead the word "Common" as an adjective or a noun, when it comes to topics like character trait, usual, ordinary, average.
How words are described
Both words in one sentence
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A common complaint from Kyota's Unwanted Harem is how a plain old-fashioned girl like Tsubaki can attract so many good-looking guys.
Source: Manga / Kyo Koi O Hajimemasu - However, when she got lost in a storm and met up with plain ol' Turan, a panthan (common soldier) who proved to be almost as good a fighter as her worshipped father, she lost her heart to him.
Source: Marriage Before Romance - These tropes are in common use throughout the genre, so we'll forgive you if you use them - but if you can think of a good way to subvert, invert, or just plain avert them, then you just might be able to start a new trend....
Cite this Source
Plain and Common. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/common/plain
Common & Plain. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/common/plain>.
Plain or Common. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/common/plain.
Google Ngram Viewer shows how "common" and "plain" have occurred on timeline