inadequacy vs jejunity

inadequacy and jejunity both are nouns.

Word	Noun	Adjective	Verb	Adverb
inadequacy	Yes	No	No	No
jejunity	Yes	No	No	No

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

Other hyponyms of inadequacy include jejuneness.

inadequacy (noun)	jejunity (noun)
unsatisfactoriness by virtue of being inadequate	the quality of being vapid and unsophisticated
lack of an adequate quantity or number	quality of inadequate nutritive value
a lack of competence