a.
1.
Untrue, unveracious, mendacious, lying, contrary to truth.
2.
Dishonest, perfidious, treacherous, disloyal, faithless, disingenuous, dishonorable, double-tongued, double-faced, ~-hearted.
3.
Unveracious, mendacious, lying, untrustworthy, unreliable, truthless, untruthful.
4.
Counterfeit, spurious, forged, not genuine, feigned, hypocritical, make-believe, sham.
5.
Incorrect, improper, erroneous, wrong, unfounded.
6.
Fallacious, deceptive, deceiving, deceitful, delusive, misleading, disappointing.