Keen
Keen adjective - Able to sense slight impressions or differences.
Old
Old adjective - Being of advanced years and especially past middle age.
Both words in one sentence
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Kingdom Hearts II:, Axel is initially a bit too keen on becoming best friends forever with Roxas (who is only 15- or rather, his soul is 15, Roxas himself is only less than a year old).
Source: Pick on Someone Your Own Size -
One of the old age pensioners is taking a keen interest on a group of school children playing around the ruins of a local castle.
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Jerk with a Heart of Gold: He's an old curmudgeon, but he has a big heart and is keen to join the fight.
Source: Characters / Suikoden IV
Cite this Source
Old and Keen. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/keen/old
Keen & Old. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/keen/old>.
Old or Keen. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/keen/old.
Google Ngram Viewer shows how "keen" and "old" have occurred on timeline