jejunity vs vapidness

jejunity and vapidness both are nouns.

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

As nouns, jejunity and vapidness are synonyms defined as:

Other synonyms of jejunity include jejuneness, tameness, vapidity.

jejunity (noun)	vapidness (noun)
the quality of being vapid and unsophisticated	the quality of being vapid and unsophisticated
quality of inadequate nutritive value