Lengthy
Lengthy adjective - Of great extent from end to end.
Tedious and lengthy are semantically related. in extended topic. In some cases you can use "Tedious" instead an adjective "Lengthy", when it comes to topics like protracted.
Tedious
Tedious adjective - Causing weariness, restlessness, or lack of interest.
Mutual synonyms
Both words in one sentence
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However, most of the terrain is randomly generated, and traveling by foot is as lengthy and tedious as playing Desert Bus.
Source: Space Compression - Owlbot: While the author certainly takes his time in a rather lengthy prelude to what's essentially the meat of the story - the drama in Area Eleven - by no means is the long prelude tedious.
Cite this Source
Tedious and Lengthy. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/lengthy/tedious
Lengthy & Tedious. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/lengthy/tedious>.
Tedious or Lengthy. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/lengthy/tedious.
Google Ngram Viewer shows how "lengthy" and "tedious" have occurred on timeline