manners vs deportment

manners and deportment both are nouns.

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

As nouns, deportment is a hypernym of manners; that is, deportment is a word with a broader meaning than manners:

manners: social deportment
deportment: (behavioral attributes) the way a person behaves toward other people

Other hypernyms of manners include behavior, behaviour, conduct, demeanor, demeanour.

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