elbow vs cloth covering

elbow and cloth covering both are nouns.

Word	Noun	Adjective	Verb	Adverb
elbow	Yes	No	Yes	No
cloth covering	Yes	No	No	No

As nouns, cloth covering is a hypernym of elbow; that is, cloth covering is a word with a broader meaning than elbow:

elbow (noun)	cloth covering (noun)
the joint of a mammal or bird that corresponds to the human elbow	a covering made of cloth
the part of a sleeve that covers the elbow joint
a sharp bend in a road or river
a length of pipe with a sharp bend in it
hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped

elbow (verb)	cloth covering (verb)
shove one's elbow into another person's ribs
push one's way with the elbows