lamp shade vs protective cover

lamp shade and protective cover both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamp shade	Yes	No	No	No
protective cover	Yes	No	No	No

As nouns, protective cover is a hypernym of lamp shade; that is, protective cover is a word with a broader meaning than lamp shade:

lamp shade: a protective ornamental covering for a lamp, used to screen a light bulb from direct view
protective cover: a covering that is intend to protect from damage or injury

Other hypernyms of lamp shade include protection, protective covering.

lamp shade (noun)	protective cover (noun)
a protective ornamental covering for a lamp, used to screen a light bulb from direct view	a covering that is intend to protect from damage or injury