Synonyms of erroneous

1 Syllable
bad, wrong, off
2 Syllables
falser, awry, falsest, off-base, baddest, untrue, unapt, flawed, askew, truthless, cruddy, amiss, faulty, bum-steer, wronging, faultier, spurious, wronger, fluffed, wrongest, badder, unsound, specious, false
3 Syllables
improper, casuistic, incorrect, mistaken, sophistic, fallacious, invalid, unfitting, unbacked, faked-out, misguided, inexact, unfounded, mendacious
4 Syllables
unreliable, defective, out-of-place, out-of-season, unbefitting, disinformed, misfigured
5 Syllables
inapposite, inaccurate, unretentive
7 Syllables
misrepresentative