mannerism vs attitude

mannerism and attitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
mannerism	Yes	No	No	No
attitude	Yes	No	No	No

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

Other hyponyms of mannerism include radical chic.

mannerism (noun)	attitude (noun)
a deliberate pretense or exaggerated display	a theatrical pose created for effect
a behavioral attribute that is distinctive and peculiar to an individual	the arrangement of the body and its limbs
	a complex mental state involving beliefs and feelings and values and dispositions to act in certain ways
	position of aircraft or spacecraft relative to a frame of reference (the horizon or direction of motion)