mien vs bearing

mien and bearing both are nouns.

Word	Noun	Adjective	Verb	Adverb
mien	Yes	No	No	No
bearing	Yes	Yes	No	No

As nouns, mien and bearing are synonyms defined as:

Other synonyms of mien include comportment, presence.

mien (noun)	bearing (noun)
dignified manner or conduct	a rotating support placed between moving parts to allow them to move easily
	heraldry consisting of a design or image depicted on a shield
	dignified manner or conduct
	characteristic way of bearing one's body
	the direction or path along which something moves or along which it lies
	relevant relation or interconnection

mien (adjective)	bearing (adjective)
	(of a structural member) withstanding a weight or strain