Colourless
Colourless adjective - Weak in color; not colorful.
Plain and colourless are semantically related. In some cases you can use "Plain" instead an adjective "Colourless".
Plain
Plain adjective - Free from all additions or embellishment.
Colourless and plain are semantically related. Sometimes you can use "Colourless" instead an adjective "Plain".
Mutual synonyms
Cite this Source
Plain and Colourless. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/colourless/plain
Colourless & Plain. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/colourless/plain>.
Plain or Colourless. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/colourless/plain.
Google Ngram Viewer shows how "colourless" and "plain" have occurred on timeline