Both words in one sentence
-
The key to Superman's Fortress of Solitude is a huge thing◊ that only he can lift; it's also used as an aircraft path marker.
Source: Cool Key -
In the Silver Age, Superman disguised the multi-ton key to his Fortress of Solitude as an "airplane marker" pointing to the North Pole.
Source: Aluminum Christmas Trees -
Chekhov's Gun: The marker switches you need to count to get Atrus' first message and really start off the plot serve as the key needed to get the final page needed to free Atrus and win the game.
Source: Video Game / Myst
Cite this Source
Marker and Key. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/key/marker
Key & Marker. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/key/marker>.
Marker or Key. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/key/marker.
Google Ngram Viewer shows how "key" and "marker" have occurred on timeline