Invalid and Persuasive

Invalid

Invalid adjective - Not using or following good reasoning.
Usage example: an argument which has one untrue premise is invalid

Persuasive is an antonym for invalid.

Persuasive

Persuasive adjective - Having the power to persuade.
Usage example: a persuasive argument for increasing funding of the city's library system

Invalid is an antonym for persuasive in topics: convincing, effective.

Both words in one sentence

  • Appeal to Force More formally, this is known as the "Argumentum ad Baculum" note Literally "appeal to the stick" or the Appeal to Force, whose logic goes essentially thus: "I'm right, and if you disagree, I beat or blow you up." While invalid in abstract logic, this tactic is rather persuasive in Real Life.
Cite this Source
Persuasive and Invalid. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/invalid/persuasive
Invalid & Persuasive. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/invalid/persuasive>.
Persuasive or Invalid. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/invalid/persuasive.
Google Ngram Viewer shows how "invalid" and "persuasive" have occurred on timeline