Certain
Observing
Observing adjective - Quick to notice; showing quick and keen perception.
Show all Definitions
Synonyms for Observing
Certain and observing are semantically related. Sometimes you can use "Certain" instead an adjective "Observing".
Both words in one sentence
- Peekaboo is based on the fact that children (below a certain age) do not know that something can exist without them observing it.
Source: Perception Filter -
In the Lonesome Road DLC of Fallout: New Vegas, Ulysses can occasionally be spotted in certain parts far from your current location, observing you G-Man style.
Source: Mysterious Watcher - Antichamber: Certain parts of the environment change or activate depending on whether or not you're actively observing them.
Source: Don't Look at Me!
Cite this Source
Observing and Certain. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/certain/observing
Certain & Observing. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/certain/observing>.
Observing or Certain. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/certain/observing.
Google Ngram Viewer shows how "certain" and "observing" have occurred on timeline