observance

As a noun observance

is the practice of complying with a law, custom, command or rule.

As a verb judaize is

to impose jewish observances or rites upon; to convert to judaism.

As nouns the difference between observance and inobservance

is that observance is the practice of complying with a law, custom, command or rule while inobservance is lack of observance.

As nouns the difference between observance and freet

is that observance is the practice of complying with a law, custom, command or rule while freet is a superstitious notion or belief with respect to any action or event as a good or a bad omen; a superstition.

As a verb freet is

form of Alternative simple past|fret|lang=en.

As nouns the difference between observance and sabbatism

is that observance is the practice of complying with a law, custom, command or rule while sabbatism is (judaism) strict observance of the sabbath.

As nouns the difference between observance and sabbatarian

is that observance is the practice of complying with a law, custom, command or rule while Sabbatarian is a person who regards and keeps the seventh day of the week ("Saturday", the Israelite or Jewish Sabbath) as holy in conformity with the fourth commandment of the Decalogue, such as an Orthodox Jew, Seventh-day Adventist, Seventh Day Baptist, a member of the Church of God (Seventh Day); a Sabbath-keeper, a Saturday-keeper.

As an adjective Sabbatarian is

of or pertaining to the Sabbath, or the tenets of Sabbatarians.