Complicate
Complicate adjective - Having many parts or aspects that are usually interrelated.
Usage example: the kind of complicate machinery that is used in the field of robotics
Challenging and complicate are semantically related. In some cases you can use "Challenging" instead an adjective "Complicate".
Challenging
Challenging adjective - Requiring considerable physical or mental effort.
Complicate and challenging are semantically related. Sometimes you can use "Complicate" instead an adjective "Challenging".
Cite this Source
Challenging and Complicate. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/complicate/challenging
Complicate & Challenging. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/complicate/challenging>.
Challenging or Complicate. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/complicate/challenging.
Google Ngram Viewer shows how "complicate" and "challenging" have occurred on timeline