Synonyms and Antonyms of impious
- an impious act that horrified their pious mother
agnostic, atheistic (or atheistical)
godless, heretical (also heretic), irreligious, miscreant, nonreligious, religionless, secular
devout, God-fearing, godly, holy, prayerful, religious, sainted, saintly, worshipful, worshipping (also worshiping)