Simple
Mutual synonyms
Both words in one sentence
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Given how Olive is very simple-minded and surrounded by her very greedy, vain sister and mother, it's no wonder she ended up that way.
Source: Literature / Ella Enchanted -
Of course, the Dying Earth series was not exactly about people killing each other — they were often too petty and vain to take the simple route to their troubles.
Source: Vancian Magic
Cite this Source
Vain and Simple. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/simple/vain
Simple & Vain. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/simple/vain>.
Vain or Simple. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/simple/vain.
Google Ngram Viewer shows how "simple" and "vain" have occurred on timeline