vapidness vs jejunity

vapidness and jejunity both are nouns.

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

As nouns, vapidness and jejunity are synonyms defined as:

Other synonyms of vapidness include jejuneness, tameness, vapidity.

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