seedcase vs peasecod

seedcase and peasecod both are nouns.

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

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

seedcase: the vessel that contains the seeds of a plant (not the seeds themselves)
peasecod: husk of a pea; edible in some garden peas

Other hyponyms of seedcase include pea pod.

seedcase (noun)	peasecod (noun)
the vessel that contains the seeds of a plant (not the seeds themselves)	husk of a pea; edible in some garden peas