demeanor vs deportment

demeanor and deportment both are nouns.

Word	Noun	Adjective	Verb	Adverb
demeanor	Yes	No	No	No
deportment	Yes	No	No	No

As nouns, demeanor and deportment are synonyms defined as:

demeanor and deportment: (behavioral attributes) the way a person behaves toward other people

Other synonyms of demeanor include behavior, behaviour, conduct, demeanour.

demeanor (noun)	deportment (noun)
(behavioral attributes) the way a person behaves toward other people	(behavioral attributes) the way a person behaves toward other people