Complex problem
Trouble and complex problem are semantically related. in complicated situation topic. In some cases you can use "Trouble" instead a noun phrase "Complex problem".
Trouble
Trouble noun - An abnormal state that disrupts a plant's or animal's normal bodily functioning.
Complex problem and trouble are semantically related. You can use "Complex problem" instead a noun "Trouble".
Mutual synonyms
Cite this Source
Trouble and Complex problem. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/complex_problem/trouble
Complex problem & Trouble. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/complex_problem/trouble>.
Trouble or Complex problem. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/complex_problem/trouble.
Google Ngram Viewer shows how "complex problem" and "trouble" have occurred on timeline