Fallacious
Fallacious adjective - Tending or having power to deceive.
Usage example: consumers who harbor the fallacious belief that credit-card spending will never catch up with them
Wrong is a synonym for fallacious in correct topic. In some cases you can use "Wrong" instead an adjective "Fallacious", when it comes to topics like false, invalid, null and void, erroneous. popular alternative
Wrong
Wrong adjective - Not being in agreement with what is true.
Usage example: her answer that Thomas Jefferson was the second president of the United States is wrong—it was John Adams, of course
Fallacious is a synonym for wrong in incorrect topic. You can use "Fallacious" instead an adjective "Wrong", if it concerns topics such as correct, false, invalid, null and void. popular alternative
Mutual synonyms
Both words in one sentence
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If this somehow backfired, calling this a wrong decision is fallacious because that would imply clairvoyance is presumed; conversely, when all data and signs are ignored, thus a silly decision was made.
Source: Artistic License Statistics - Consequential arguments are generally not fallacious if used in decision making with something that cannot be objectively provable - i.e., (desirable/undesirable, or morally right/morally wrong, not is it true).
Source: Appeal to Consequences
Cite this Source
Wrong and Fallacious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fallacious/wrong
Fallacious & Wrong. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fallacious/wrong>.
Wrong or Fallacious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fallacious/wrong.
Google Ngram Viewer shows how "fallacious" and "wrong" have occurred on timeline