Cos
Cos noun - Lettuce with long dark-green leaves in a loosely packed elongated head.
Romaine lettuce is a synonym for cos. In some cases you can use "Romaine lettuce" instead a noun "Cos". popular alternative
Romaine lettuce
Romaine lettuce noun - Lettuce with long dark-green leaves in a loosely packed elongated head.
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Synonyms for Romaine lettuce
Mutual synonyms
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Romaine lettuce and Cos. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/cos/romaine_lettuce
Cos & Romaine lettuce. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/cos/romaine_lettuce>.
Romaine lettuce or Cos. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/cos/romaine_lettuce.
Google Ngram Viewer shows how "cos" and "romaine lettuce" have occurred on timeline