Synonyms of believing

1 Syllable

loyal, sure

2 Syllables

certain, holier, trusting, holiest, churchgoing, prayerful, theistic, deistic, holy

3 Syllables

religious, pietistic, convinced, questionless, undoubting, presuming, saintlike, credulous, godfearing, assuming, gullible, messianic, accepting

4 Syllables

self-assured, pietistical, positive, unskeptical