manners vs conduct

manners and conduct both are nouns.

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

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

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

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

manners (noun)	conduct (noun)
social deportment	manner of acting or controlling yourself
	(behavioral attributes) the way a person behaves toward other people

manners (verb)	conduct (verb)
	behave in a certain manner; show a certain behavior; conduct or comport oneself
	lead, as in the performance of a composition
	lead musicians in the performance of
	transmit or serve as the medium for transmission
	take somebody somewhere
	direct the course of; manage or control