What is the synonym of formality?

Here are some synonyms for "formality," depending on the context:

General:

* Ceremony

* Protocol

* Convention

* Ritual

* Custom

* Form

* Structure

* Rigor

More specific:

* Stiffness (for behavior)

* Propriety (for behavior)

* Precision (for language)

* Officialism (for procedures)

* Legalism (for rules)

* Bureaucracy (for system)

The best synonym to use will depend on the specific situation and the meaning you want to convey.