husk vs sheath

husk and sheath both are nouns.

Word	Noun	Adjective	Verb	Adverb
husk	Yes	No	Yes	No
sheath	Yes	No	No	No

As nouns, sheath is a hypernym of husk; that is, sheath is a word with a broader meaning than husk:

husk: outer membranous covering of some fruits or seeds
sheath: an enveloping structure or covering enclosing an animal or plant organ or part

Other hypernyms of husk include case.

husk (noun)	sheath (noun)
outer membranous covering of some fruits or seeds	a protective covering (as for a knife or sword)
material consisting of seed coverings and small pieces of stem or leaves that have been separated from the seeds	a dress suitable for formal occasions
	an enveloping structure or covering enclosing an animal or plant organ or part

husk (verb)	sheath (verb)
remove the husks from