shoulder vs rotator cuff

shoulder and rotator cuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoulder	Yes	No	Yes	No
rotator cuff	Yes	No	No	No

shoulder (noun)	rotator cuff (noun)
a narrow edge of land (usually unpaved) along the side of a road	a supporting structure of the shoulder consisting of the muscles and tendons that attach the arm to the shoulder joint and enable the arm to move
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 (verb)	rotator cuff (verb)
push with the shoulders
carry a burden, either real or metaphoric
lift onto one's shoulders