Become obdurate
Fossilize and become obdurate are semantically related. In some cases you can use "Fossilize" instead a verb phrase "Become obdurate".
Fossilize
Fossilize verb - Convert to a fossil.
Become obdurate and fossilize are semantically related. You can use "Become obdurate" instead a verb "Fossilize".
Mutual synonyms
Cite this Source
Fossilize and Become obdurate. (2017). Retrieved 2026, August 13, from https://thesaurus.plus/related/become_obdurate/fossilize
Become obdurate & Fossilize. N.p., 2017. Web. 13 Aug. 2026. <https://thesaurus.plus/related/become_obdurate/fossilize>.
Fossilize or Become obdurate. 2017. Accessed August 13, 2026. https://thesaurus.plus/related/become_obdurate/fossilize.
Google Ngram Viewer shows how "become obdurate" and "fossilize" have occurred on timeline