Alert
Alert adjective - Paying close attention usually for the purpose of anticipating approaching danger or opportunity.
Usage example: she needed to stay alert throughout the train ride so as not to miss her stop
Keen is a synonym for alert in ability topic. In some cases you can use "Keen" instead an adjective "Alert", when it comes to topics like characteristic, mindful, quick-witted.
Keen
Keen adjective - Having or showing quickness of mind.
Usage example: readers who were keen enough to realize that the writer was being satirical
Alert is a synonym for keen in ability topic. You can use "Alert" instead an adjective "Keen", if it concerns topics such as characteristic, aware, mindful, enthusiastic.
Mutual synonyms
Common collocations
| readers | alert readers | keen readers |
Cite this Source
Keen and Alert. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/alert/keen
Alert & Keen. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/alert/keen>.
Keen or Alert. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/alert/keen.
Google Ngram Viewer shows how "alert" and "keen" have occurred on timeline