pointlessness vs inanity

pointlessness and inanity both are nouns.

Word	Noun	Adjective	Verb	Adverb
pointlessness	Yes	No	No	No
inanity	Yes	No	No	No

As nouns, pointlessness and inanity are synonyms defined as:

Other synonyms of pointlessness include mindlessness, senselessness, vacuity.

pointlessness (noun)	inanity (noun)
total lack of meaning or ideas	total lack of meaning or ideas