Same word as phoniness:

ambidexterity, ambidextrous, artificiality, backhanded, deceitful, deceptive, devious, disingenuous, disingenuousness, dissembling, dissimulating, double, double-dealing, duplicitous, evasive, faithless, fake, false, hollow, hypocritical, lying, mendacious, perfidious, phony, pretentious, put-on, shifty, slick, sly, snide, two-faced, unfaithful, untrue, untruthful