Key
Key noun - An explanatory list of the symbols on a map or chart.
Observation and key are semantically related. In some cases you can use "Observation" instead a noun "Key".
Observation
Observation noun - A state of being aware.
Key and observation are semantically related. Sometimes you can use "Key" instead a noun "Observation".
Mutual synonyms
How words are described
Both words in one sentence
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Spotting the Thread: The key to an objective observation of the minority report of the death of Agatha's mother was that with the supposed duplicate murder the water was rippling in a different direction, thereby occured at a different time of day.
Source: Film / Minority Report -
Phèdre's observation and subterfuge skills are key to many of their plans.
Source: Literature / Kushiel's Legacy
Cite this Source
Observation and Key. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/key/observation
Key & Observation. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/key/observation>.
Observation or Key. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/key/observation.
Google Ngram Viewer shows how "key" and "observation" have occurred on timeline