Complicated
Complicated adjective - Having many parts or aspects that are usually interrelated.
Usage example: a complicated apparatus
Tough and complicated are semantically related. In some cases you can use "Tough" instead an adjective "Complicated".
Tough
Tough adjective - Requiring considerable physical or mental effort.
Usage example: even if you study for it, it's still a tough exam
Complicated and tough are semantically related. Sometimes you can use "Complicated" instead an adjective "Tough".
Mutual synonyms
Related pairs
Both words in one sentence
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When things in a plot get really, really complicated, it gets tough to keep track of all the disparate elements.
Source: Ahem -
Marathon Level: Baya Malay Tower is the biggest and most complicated dungeon in the game, with many dead ends and looping corridors to get hopelessly lost in while tough monsters whittle down your party's HP and MP.
Source: Video Game / Phantasy Star I -
This task involves remaining celibate, which is tough for Jarrell because he's got the hots for his Sidekick Kee Nang, and made even more complicated by the facts that (a) he's not allowed to tell her about it, and (b) once he stops being such a Jerk Ass, she starts falling for him.
Source: Celibate Hero
Cite this Source
Tough and Complicated. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/complicated/tough
Complicated & Tough. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/complicated/tough>.
Tough or Complicated. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/complicated/tough.
Google Ngram Viewer shows how "complicated" and "tough" have occurred on timeline