Concern
Concern noun - A commercial or industrial activity or organization.
Thorny problem and concern are semantically related. In some cases you can use "Thorny problem" instead a noun "Concern".
Thorny problem
Concern and thorny problem are semantically related. Sometimes you can use "Concern" instead a noun phrase "Thorny problem".
Cite this Source
Thorny problem and Concern. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/concern/thorny_problem
Concern & Thorny problem. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/concern/thorny_problem>.
Thorny problem or Concern. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/concern/thorny_problem.
Google Ngram Viewer shows how "concern" and "thorny problem" have occurred on timeline