article of clothing vs covering

article of clothing and covering both are nouns.

Word	Noun	Adjective	Verb	Adverb
article of clothing	Yes	No	No	No
covering	Yes	No	No	No

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

article of clothing: a covering designed to be worn on a person's body
covering: an artifact that covers something else (usually to protect or shelter or conceal it)

Other hypernyms of article of clothing include consumer goods.

article of clothing (noun)	covering (noun)
a covering designed to be worn on a person's body	the act of protecting something by covering it
	the work of applying something
	the act of concealing the existence of something by obstructing the view of it
	an artifact that covers something else (usually to protect or shelter or conceal it)
	a natural object that covers or envelops