Overoptimistic
Vain and overoptimistic are semantically related. In some cases you can use "Vain" instead an adjective "Overoptimistic".
Vain
Vain adjective - Having too high an opinion of oneself.
Overoptimistic and vain are semantically related. You can use "Overoptimistic" instead an adjective "Vain".
Cite this Source
Vain and Overoptimistic. (2016). Retrieved 2026, August 11, from https://thesaurus.plus/related/overoptimistic/vain
Overoptimistic & Vain. N.p., 2016. Web. 11 Aug. 2026. <https://thesaurus.plus/related/overoptimistic/vain>.
Vain or Overoptimistic. 2016. Accessed August 11, 2026. https://thesaurus.plus/related/overoptimistic/vain.
Google Ngram Viewer shows how "overoptimistic" and "vain" have occurred on timeline