Keen
Keen adjective - Able to sense slight impressions or differences.
On lookout and keen are semantically related In some cases you can replace phrase "On lookout" with "Keen", this terms are similar.
On lookout
Keen and on lookout are semantically related in careful topic. You can use "Keen" instead an adjective phrase "On lookout".
Mutual synonyms
Cite this Source
On lookout and Keen. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/keen/on_lookout
Keen & On lookout. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/keen/on_lookout>.
On lookout or Keen. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/keen/on_lookout.
Google Ngram Viewer shows how "keen" and "on lookout" have occurred on timeline