| precedent(noun, form, style, rule, practice) |
| rite(noun, style, rule, practice, system) |
| ritual(noun, style, rule, practice, system) |
| routine(noun, style, rule, practice, system) |
| rule(noun, style, practice, system, method) |
| second nature(noun, expression, style, rule, practice) |
| style(noun, rule, practice, system, method) |
| system(noun, style, rule, practice, method) |
| taste(noun, style, rule, practice, system) |
| traditional action(noun, expression, style, rule, practice) |
| type(noun, style, rule, practice, system) |
| unwritten law(noun, expression, style, rule, practice) |
| unwritten rule(noun, expression, style, rule, practice) |
| usage(noun, style, rule, practice, system) |
| use(noun, style, rule, practice, system) |
| vogue(noun, style, rule, practice, system) |
| way(noun, style, rule, practice, system) |
| acquaintance |
| averageness |
| casualness |