Latitudinarianism, n.
A latitudinarian system or condition; freedom of opinion in matters pertaining to religious belief. Fierce sectarianism bred fierce latitudinarianism. De Quincey. He [Ammonius Saccas] plunged into the wildest latitudinarianism of opinion. J. S. Harford.
Shades of meaning
Fernald lists latitudinarianism only as an antonym, under fanaticism.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given