indument vs natural covering

indument and natural covering both are nouns.

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

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

indument: a covering of fine hairs (or sometimes scales) as on a leaf or insect
natural covering: a natural object that covers or envelops

Other hypernyms of indument include cover, covering.

indument (noun)	natural covering (noun)
a covering of fine hairs (or sometimes scales) as on a leaf or insect	a natural object that covers or envelops