Curve
Rainbow
Rainbow noun - An arc of colored light in the sky caused by refraction of the sun's rays by rain.
Curve and rainbow are semantically related in color spectrum topic. Sometimes you can use "Curve" instead a noun "Rainbow".
Both words in one sentence
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And on one occasion, the colours on Rainbow Dash's tail continue to curve smoothly even where the end of the tail is ruffled into a zigzag.
Source: Unmoving Plaid
Cite this Source
Rainbow and Curve. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/curve/rainbow
Curve & Rainbow. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/curve/rainbow>.
Rainbow or Curve. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/curve/rainbow.
Google Ngram Viewer shows how "curve" and "rainbow" have occurred on timeline