the quality of being disloyal; lack of loyalty; unfaithfulness.

violation of allegiance or duty, as to a government.

a disloyal act.

noun

faithfulness , loyalty , trueness , trustworthiness

noun

apostasy , bad faith , betrayal of trust , breach of trust , breaking of faith , deceitfulness , disaffection , double-dealing , faithlessness , falseness , falsity , inconstancy , infidelity , perfidiousness , perfidy , recreancy , sedition , seditiousness , subversive activity , treachery , treason , untrueness , violation , false-heartedness , traitorousness , treacherousness , unfaithfulness , betrayal , insurrection , mutiny , rebellion