Issue
Issue noun - A condition or occurrence traceable to a cause.
Knotty problem and issue are semantically related. In some cases you can use "Knotty problem" instead a noun "Issue".
Knotty problem
Issue and knotty problem are semantically related. Sometimes you can use "Issue" instead a noun phrase "Knotty problem".
Mutual synonyms
Cite this Source
Knotty problem and Issue. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/issue/knotty_problem
Issue & Knotty problem. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/issue/knotty_problem>.
Knotty problem or Issue. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/issue/knotty_problem.
Google Ngram Viewer shows how "issue" and "knotty problem" have occurred on timeline