Synonyms of apostasy

3 Syllables
desertion, disownment, defections, heresy, defection, heresies, rebellion, disloyalty, recreancy, rebellions, desertions, untrueness
4 Syllables
secularism, abandonment, disaffection, revisionism, dereliction, unfaithfulness, insurgence, insurgency, estrangement, insurgencies
5 Syllables
tergiversation