dressing vs covering

dressing and covering both are nouns.

Word	Noun	Adjective	Verb	Adverb
dressing	Yes	No	No	No
covering	Yes	No	No	No

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

dressing (noun)	covering (noun)
the activity of getting dressed; putting on clothes	the act of protecting something by covering it
the act of applying a bandage	the work of applying something
processes in the conversion of rough hides into leather	the act of concealing the existence of something by obstructing the view of it
a cloth covering for a wound or sore	an artifact that covers something else (usually to protect or shelter or conceal it)
making fertile as by applying fertilizer or manure	a natural object that covers or envelops
savory dressings for salads; basically of two kinds: either the thin French or vinaigrette type or the creamy mayonnaise type
a mixture of seasoned ingredients used to stuff meats and vegetables