Not fruitful
Vain and not fruitful are semantically related. In some cases you can use "Vain" instead an adjective phrase "Not fruitful".
Vain
Vain adjective - Having too high an opinion of oneself.
Not fruitful and vain are semantically related. Sometimes you can use "Not fruitful" instead an adjective "Vain".
Mutual synonyms
Cite this Source
Vain and Not fruitful. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/not_fruitful/vain
Not fruitful & Vain. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/not_fruitful/vain>.
Vain or Not fruitful. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/not_fruitful/vain.
Google Ngram Viewer shows how "not fruitful" and "vain" have occurred on timeline