apocryphal, beguiling, bogus, casuistic, concocted, contrary to fact, cooked-up, counterfactual, deceitful, deceiving, delusive, dishonest, distorted, erroneous, ersatz*, fake, fallacious, fanciful, faulty, fictitious, fishy, fraudulent, illusive, imaginary, improper, inaccurate, incorrect, inexact, invalid, lying, mendacious, misleading, misrepresentative, mistaken, off the mark, phony, sham, sophistical, specious, spurious, trumped up, unfounded, unreal, unsound, untrue, untruthful
(list from thesaurus.com)
falsify
falsify
The word that means something fake or false is "counterfeit."
The word valid means true and the word faulty means false.
To make up a story is to fabricate, to concoct, or to contrive a false explanation.
pseudopods
Latin for 'false explanation' is 'falsa explicatio'.
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specious
Λάθος [lathos]
The word means fake or false.
The root word of pseudonym is "pseudo," which in Greek means false or deceptive.
The root word 'pseudo' means false or deceptive, and is commonly used to describe something that is not genuine or authentic.