Active
Active adjective - Having much high-spirited energy and movement.
Usage example: the fish are active today, but we still haven't caught anything
Keen is a synonym for active in enthusiastic topic. In some cases you can use "Keen" instead an adjective "Active", when it comes to topics like very involved in activity.
Keen
Keen adjective - Able to sense slight impressions or differences.
Mutual synonyms
Both words in one sentence
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Keen Eddie: One's a scruffy, accident-prone, idealistic detective from Manhattan, the other's a shallow London dandy with an addictive personality and an over-active libido.
Source: They Fight Crime - Ironically, the LiveJournal fans, which are far kinder, appear to average between three and four new topics a month, while the Keen Spot forum (the most vocal hatedom) has an active community and posts a thread for every new comic strip.
Source: Broken Base / Web Media
Cite this Source
Keen and Active. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/active/keen
Active & Keen. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/active/keen>.
Keen or Active. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/active/keen.
Google Ngram Viewer shows how "active" and "keen" have occurred on timeline