Not completed
Plain and not completed are semantically related. In some cases you can use "Plain" instead an adjective phrase "Not completed".
Plain
Plain adjective - Free from all additions or embellishment.
Not completed and plain are semantically related. Sometimes you can use "Not completed" instead an adjective "Plain".
Cite this Source
Plain and Not completed. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/not_completed/plain
Not completed & Plain. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/not_completed/plain>.
Plain or Not completed. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/not_completed/plain.
Google Ngram Viewer shows how "not completed" and "plain" have occurred on timeline