Observant
Observant adjective - Paying close attention usually for the purpose of anticipating approaching danger or opportunity.
Usage example: if you were more observant, you would perceive that something is troubling her deeply
Sharp is a synonym for observant in alert topic. In some cases you can use "Sharp" instead an adjective "Observant", when it comes to topics like behaviour, character trait.
Mutual synonyms
Both words in one sentence
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Anjuli is this as well, despite having no formal education whatsoever, remains sharp and observant.
Source: Literature / The Far Pavilions - Young moviegoers, in my experience, are sharp and observant: Bored by countless hours of brainless television, they don't want the same old stuff on a movie screen.
Source: Roger Ebert Most Hated Film List -
Obfuscating Stupidity: Mona's Valley Girl act barely hides what is an obviously sharp, observant and intelligent mind.
Source: Literature / Pretty Little Liars
Cite this Source
Sharp and Observant. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/observant/sharp
Observant & Sharp. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/observant/sharp>.
Sharp or Observant. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/observant/sharp.
Google Ngram Viewer shows how "observant" and "sharp" have occurred on timeline