Diffuse
Lengthy
Lengthy adjective - Of great extent from end to end.
Diffuse is a synonym for lengthy in extended topic. You can use "Diffuse" instead an adjective "Lengthy", if it concerns topics such as protracted.
Mutual synonyms
Cite this Source
Lengthy and Diffuse. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/diffuse/lengthy
Diffuse & Lengthy. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/diffuse/lengthy>.
Lengthy or Diffuse. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/diffuse/lengthy.
Google Ngram Viewer shows how "diffuse" and "lengthy" have occurred on timeline