Effective
Effective adjective - Producing or capable of producing a desired result.
Usage example: an effective treatment of the once-dreaded disease
Vain
Vain adjective - Producing no results.
Usage example: all their efforts to escape proved vain
Both words in one sentence
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They're often campy, vain, and in many cases pretty, but they're also incredibly effective at what they do, and quite powerful.
Source: Agent Peacock
Cite this Source
Vain and Effective. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/effective/vain
Effective & Vain. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/effective/vain>.
Vain or Effective. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/effective/vain.
Google Ngram Viewer shows how "effective" and "vain" have occurred on timeline