Key
Key adjective - Coming before all others in importance.
Usage example: maintains that Sir Isaac Newton remains the key figure in physical science
Noteworthy and key are semantically related. In some cases you can use "Noteworthy" instead an adjective "Key".
Noteworthy
Noteworthy adjective - Worth remembering or mentioning.
Key and noteworthy are semantically related. Sometimes you can use "Key" instead an adjective "Noteworthy".
Mutual synonyms
Both words in one sentence
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In the final episode of Kamen Rider Decade, Tsukasa pulls this one off against Apollo Geist; especially noteworthy since his cards are key elements of his Transformation Trinket.
Source: Death Dealer - Trigun is noteworthy for not only having a Gecko Ending, it has two key plot points to the manga which was finished about a decade later.
Source: Gecko Ending - Lilo & Stitch uses the most noteworthy songs from the King of Rock 'n' Roll Elvis Presley in several key scenes, including a musical number with Nani trying to find a job.
Source: Dueling Works / Film Cross Genre
Cite this Source
Noteworthy and Key. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/key/noteworthy
Key & Noteworthy. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/key/noteworthy>.
Noteworthy or Key. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/key/noteworthy.
Google Ngram Viewer shows how "key" and "noteworthy" have occurred on timeline