husk vs seedcase

husk and seedcase both are nouns.

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

As nouns, seedcase is a hyponym of husk; that is, seedcase is a word with a more specific, narrower meaning than husk:

husk: outer membranous covering of some fruits or seeds
seedcase: the vessel that contains the seeds of a plant (not the seeds themselves)

Other hyponyms of husk include cornhusk, hull, cod, pod, bract.

husk (noun)	seedcase (noun)
outer membranous covering of some fruits or seeds	the vessel that contains the seeds of a plant (not the seeds themselves)
material consisting of seed coverings and small pieces of stem or leaves that have been separated from the seeds

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