mantle vs natural covering

mantle and natural covering both are nouns.

Word	Noun	Adjective	Verb	Adverb
mantle	Yes	No	Yes	No
natural covering	Yes	No	No	No

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

Other hypernyms of mantle include cover, covering.

mantle (noun)	natural covering (noun)
a sleeveless garment like a cloak but shorter	a natural object that covers or envelops
hanging cloth used as a blind (especially for a window)
shelf that projects from wall above fireplace
(zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell
the cloak as a symbol of authority
the layer of the earth between the crust and the core
anything that covers

mantle (verb)	natural covering (verb)
cover like a mantle
spread over a surface, like a mantle