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
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
The Latin equivalent of 'false explanation' is Explicatio falsa. In the word-by-word translation, the noun 'explicatio' means 'explanation'. The adjective 'falsa' means 'false'.
ijgffgug
specious
Λάθος [lathos]
The word means fake or false.
nym which means name and suffix is pseudo so the complete word means false or fictious name
The root word of "falsify" is "false," which means not true or accurate.