shoulder blade vs shoulder

shoulder blade and shoulder both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoulder blade	Yes	No	No	No
shoulder	Yes	No	Yes	No

shoulder blade (noun)	shoulder (noun)
either of two flat triangular bones one on each side of the shoulder in human beings	a narrow edge of land (usually unpaved) along the side of a road
	the part of a garment that covers or fits over the shoulder
	the part of the body between the neck and the upper arm
	a ball-and-socket joint between the head of the humerus and a cavity of the scapula
	a cut of meat including the upper joint of the foreleg

shoulder blade (verb)	shoulder (verb)
	push with the shoulders
	carry a burden, either real or metaphoric
	lift onto one's shoulders