Synonyms and related words :
Punic faith, apostasy, backsliding, bad faith, barratry, betrayal, bolt, breach of faith, breach of promise, breach of trust, breakaway, defection, dereliction, desertion, disaffection, faithlessness, falseness, falsity, fickleness, going over, inconstancy, infidelity, mala fides, perfidiousness, perfidy, ratting, recidivation, recidivism, recreancy, secession, treacherousness, treason, trothlessness, turning traitor, unfaith, unfaithfulness, unloyalty, unsteadfastness, untrueness