THESAURUS
amorality, backsliding, carnality, criminality, delinquency, evil, evil nature, godlessness, immorality, impiety, impurity, irreligion, moral delinquency, peccability, prodigality, recidivism, sinfulness, un-Christliness, unangelicalness, unchastity, unchristianliness, uncleanness, ungoodness, unholiness, unmorality, unrighteousness, unsaintliness, unvirtuousness, vice, viciousness, wantonness, waywardness, wickedness, wrongdoing
ROGET THESAURUS
Irreligion
N
irreligion, indevotion, godlessness,
ungodliness, laxity, quietism, skepticism, doubt, unbelief, disbelief, incredulity, incredulousness, want of faith, want of belief, pyrrhonism, bout, agnosticism, atheism, deism, hylotheism, materialism, positivism, nihilism, infidelity, freethinking, antichristianity, rationalism, neology, atheist, skeptic, unbeliever, deist, infidel, pyrrhonist, giaour, heathen, alien, gentile, Nazarene, espri fort, freethinker, latitudinarian, rationalist, materialist, positivist, nihilist, agnostic, somatist, theophobist, irreligious, indevout, undevout, devoutless, godless, graceless, ungodly, unholy, unsanctified, unhallowed, atheistic, without God, skeptical, freethinking, unbelieving, unconverted, incredulous, faithless, lacking faith, deistical, unchristian, antichristian, worldly, mundane, earthly, carnal, worldly minded, irreligiously.