Effective
Effective adjective - Producing or capable of producing a desired result.
Usage example: an effective treatment of the once-dreaded disease
Useless is an antonym for effective in topics: efficient, productive, ineffective, in use at the time.
Useless
Useless adjective - Producing no results.
Usage example: a useless attempt to reach an agreement
Both words in one sentence
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Also, unlike other shows that feature the police being useless or otherwise ineffective, the police will play a major and effective role in the show.
Source: Series / Kamen Rider Kuuga -
Inexperienced players, who might assume they are as effective as regular cannons at range, then proceed to spray the battlefield around their target with useless, useless tracers.
Source: Video Game / World of Tanks - It's so effective at what it does it actually justifies it being useless for 95% of the game.
Source: Situational Damage Attack
Cite this Source
Useless and Effective. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/effective/useless
Effective & Useless. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/effective/useless>.
Useless or Effective. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/effective/useless.
Google Ngram Viewer shows how "effective" and "useless" have occurred on timeline