Pharisaism, n.
Etymology: [Cf. F. pharisaisme.]
1. The notions, doctrines, and conduct of the Pharisees, as a sect. Sharp.
2. Rigid observance of external forms of religion, without genuine piety; hypocrisy in religion; a censorious, self-righteous spirit in matters of morals or manners. "A piece of pharisaism." Hammond.
Shades of meaning
Fernald has no entry of its own for pharisaism; he lists it under hypocrisy.
He lists it without comment; the entries above explain its neighbors.