is a specific kind of: behavior, behaviour, conduct, demeanor, demeanour, deportment.

is a broader term that covers: decorousness, decorum | appropriateness, rightness | correctness | good form | priggishness, primness | modesty, reserve | grace, seemliness | decency.

is an attribute of: proper | improper.

is the opposite of: improperness, impropriety.

derivation: proper, right.