behavior vs properness

behavior and properness both are nouns.

Word	Noun	Adjective	Verb	Adverb
behavior	Yes	No	No	No
properness	Yes	No	No	No

As nouns, properness is a hyponym of behavior; that is, properness is a word with a more specific, narrower meaning than behavior:

behavior: (behavioral attributes) the way a person behaves toward other people
properness: correct or appropriate behavior

behavior (noun)	properness (noun)
manner of acting or controlling yourself	correct or appropriate behavior
(psychology) the aggregate of the responses or reactions or movements made by an organism in any situation
(behavioral attributes) the way a person behaves toward other people
the action or reaction of something (as a machine or substance) under specified circumstances