rotator cuff vs structure

rotator cuff and structure both are nouns.

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

As nouns, structure is a hypernym of rotator cuff; that is, structure is a word with a broader meaning than rotator cuff:

rotator cuff: 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
structure: a particular complex anatomical part of a living thing and its construction and arrangement

Other hypernyms of rotator cuff include anatomical structure, bodily structure, body structure, complex body part.

rotator cuff (noun)	structure (noun)
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	a thing constructed; a complex entity constructed of many parts
	the manner of construction of something and the arrangement of its parts
	a particular complex anatomical part of a living thing and its construction and arrangement
	the complex composition of knowledge as elements and their combinations
	the people in a society considered as a system organized by a characteristic pattern of relationships

rotator cuff (verb)	structure (verb)
	give a structure to