Headstrong
Headstrong adjective - Given to resisting control or discipline by others.
Keen and headstrong are semantically related. In some cases you can use "Keen" instead an adjective "Headstrong".
Keen
Keen adjective - Able to sense slight impressions or differences.
Headstrong and keen are semantically related. Sometimes you can use "Headstrong" instead an adjective "Keen".
Both words in one sentence
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Split Personality: Shaymin in Land Forme is cowardly, rude, and ungrateful, but when it changes to Sky Forme, it becomes brave, adventurous, and headstrong, almost like it becomes an entirely different Pokemon (he's still keen on being thanked while not thanking others, though).
Cite this Source
Keen and Headstrong. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/headstrong/keen
Headstrong & Keen. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/headstrong/keen>.
Keen or Headstrong. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/headstrong/keen.
Google Ngram Viewer shows how "headstrong" and "keen" have occurred on timeline