Keen
Keen adjective - Able to sense slight impressions or differences.
Mentally deranged and keen are semantically related. In some cases you can use "Mentally deranged" instead an adjective "Keen".
Mentally deranged
Keen and mentally deranged are semantically related. Sometimes you can use "Keen" instead an adjective phrase "Mentally deranged".
Mutual synonyms
Cite this Source
Mentally deranged and Keen. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/keen/mentally_deranged
Keen & Mentally deranged. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/keen/mentally_deranged>.
Mentally deranged or Keen. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/keen/mentally_deranged.
Google Ngram Viewer shows how "keen" and "mentally deranged" have occurred on timeline